i have done this problem over and over 2x-y=4 2x-y = 6 i came up with (0,2) (3,0)?
144689
there is no answer, as the lines are parellel.
232592
2x = 3y - 4y + 5 - 2\n2x = -y + 3\n2x + y = 3
549653
Subtract 2x from each side\n-y = 0 - 2x\nMultiply each side by -1\ny = 2x
848564
Substitute 2x-1 for y in the middle part, you get:\nx^2 + x -6(2x-1) = 2x-1\nThis you can reduce to a quadratic equation for x.
119155
you're given these two equations:\n\n2x+4y=16\n8y+4x=32\n\nthe second equation can also be:\n\n8y+4x=32\n4x+8y=32\n2x+4y=16, which woah - is the same as the first equation!  in other words, the two equations are the same and, when graphed, are the same lines.  that means any point along the line is a solution.  thus, there are an infinite number of solutions.  one POSSIBLE solution is shown below:\n\n2x+4y=16\nx+2y=8, choose any "x" since this equation will work for all "x"s; say, let x=2.\n2+2y=8\n2y=6\ny=3, therefore x=2,y=3 is A solution.  plugging these back in gives you:\n\n2x+4y=16 ==> 2(2)+4(3)=16 ==> 4+12=16 ==> 16=16\n8y+4x=32 ==> 8(3)+4(2)=32 ==> 24+8=32 ==> 32=32\n\nta-da!
735754
just plug the numbers in.  if y=8, and x=2, \nits 8=a(2^2)\nso 8=a(4)\nso a=2.\nhope that helps!
223041
uh..... no. Unless I am missing something, you substitute the 3 for 'x' and the 2 for 'y' and get 3+(3 x 2) = 3 + 6 = 9
201432
x=2 and y =2,\n\n2^2=2^2 and 2*2 = 2 + 2 =4
684399
if x + y = 12 and y = 2x, then in the original equation, you can substitute 2x for y.\n\nx + 2x = 12\n\ncombine like terms\n\n3x = 12\n\ndivide both sides by 3\n\nx = 4\n\nbecause y = 2x, substitute x for 4.\n\ny = 2(4)\n\ny = 8
214212
Hi, here's how ya do the problem:\n\n-5x+y=6\n\ny=5x+6 (move -5x over by adding the opposite)\n\nSo then you substitute it into the problem\n3x-2y=3 so that it looks like\n\n3x-2(5x+6)=3\n\nNext distribute the -2\n3x-10x-12=3\n\nand solve\n-7x-12=3\n-7x=15\nx=2.14\n\nThen you substitute 2.14 into either equation to figure out y\n-5(2.14)+y=6\n-10.70+y=6\ny=16.7\n\nHope this helps!
935267
3x+2y=12\n3x+y=9\n(2)*-2\n-6x-2y=-18\n3x+2y=12\nadding\n-3x=-6\ndividing by -3\nx=2\nsub x=2 in 3x+2y=12\n6+2y=12\nadding -6\n2y=6\ndividing by 2\ny=3
498659
1) y=x+4\n   3x+y=16 (I guess you made a mistake by writing +16)\n--------------\nsubstitute x+4 for y in second equation and you'll get\n\n   3x+x+4=16\n    4x+4=16\n    4x=12\n     x=3\n\nnow y=x+4=3+4=7\n\nsolution (x,y)=(3,7)\n\n2) 4x+5y=48\n    y=3x+2\n--------------\nsubstitute 3x+2 for y in first eq.\n\n4x+5(3x+2)=48\n\n4x+15x+10=48\n\n19x=38\n\nx=2\n\nnow y=3x+2=3*2+2=6+2=8\n\nsolution (x,y)=\n(2,8)\n\n3)3x-y=0\ny=6\nin first equation instead of y write 6\n\n3x-6=0\n3x=6\nx=2\n\nso, the solution is (2,6)\n\n4) x-2y=-10\n3x-y=0\n\nfrom the first equation you have\nx=2y-10\nnow substitute 2y-10 for x in second one\n\n3(2y-10)-y=0\n6y-30-y=0\n\n5y=30\ny=6 \nnow x=2y-10=2*6-10=12-10=2\nso x=2 and y=6
91756
Ok if you have like 5x+6=y,and x=2,then obviously use substitution. Substitute the x for the 2 and solve. Y would equal 16. If you have any system that has variable=whatever then that would be easier because in the second equation you would just have to substitute the variable for whatever it equals. Hope this helps.
747340
-2x-x > -6 + 4\n-3x > -2 \nx < 2/3
917321
x+y=2\n2x-y=0\n\nx=2-y\n2(2-y)-y=0\n\nX=2-y     \n4-3y=0   \n\nx=2-4/3\ny=4/3
744692
Consider the following equations:\n1)   2x + y = 4 \n  \n2)   x − y = −1 \n\nTo solve them simultaneously, first, you need to solve one equation with respect to one variable. Let's solve the first one:\n\n2x + y = 4  Rearranging, you get:\ny = 4 - 2x\nNow you know the value of y, so plug it into the second equation, like this:\n\nx − y = −1 Rearrange using the value for y that you determined above:\n\nx - (4 - 2x) = -1\nNow solve this equation, since it now has only one variable:\n\nx - 4 + 2x = -1\n3x = 4 - 1 = 3\nx = 1 Now that you have the real value for x, go back to the first equation and solve for the real value of y:\n\n2x + y = 4  \ny = 4 - 2x  we know x = 1 so, y = 4 - 2\ny = 2\n\nYou can prove these are the right answers by using them in the equations.
218375
4x+2y=12\n2y=12-4x\ny=6-2x\n\ny=-2x+6\n\nfrom \ny=mx+b\n\nwhere M= slope\nb= intersept\ntherefore y intersept will be +6