Solve for x in 12=-1/7(-42x+21)?
927886
4) 5/2 b/c:\n1) 84 = -(-42x+21)    cross multiply\n2) 84 = 42x-21           distribute the negative.\n3) 84 + 21= 42x -21+21     add 21 to each side\n4) 105 = 42x\n5) x = 2.5 or 5/2                divide each side by 42
786009
-2(x-3) + 4(x+7)\n-2x+6   +4x+28\n2x+34
726112
you distribute the -3/2 to the x and 2 and get 21= -3/2x+3\nsubtract 3\n18=-3/2x\ntimes each side by its reciprocal which would be -2/3\n18x-2/3=-12\nso x= -12
721887
1)t= -12    2) x= -8    3) x= 7/5 or 1 2/5
931612
f^{-1}(y) = (y-42) / 7\ns
714160
x^2+6x+8/x^2-4-21 / x^2-4/x^2-7x\n=x^2 + 6x +(8/x^2) - 4 - (21/x^2) - (4/x^2) - 7x\n=x^2 + 6x -4 -7x +(8/x^2) - (21/x^2) - (4/x^2) \n=x^2 + 6x -4 -7x +[8-21-4]/x^2\n=x^2 + 6x -4 -7x -17/x^2\n=(x^2)*[x^2 - x -4  -17]/x^2\n=(x^2)*(x^2) - (x^2)*(x) -4*(x^2)  -17]/x^2\n=(x^4) - (x^3) - 4(x^2)x -17]/x^2
619268
52x=-14+(-35x)\n52x=-14-35x\n87x=-14\nx=(-14)/87\n\n\nand\n\n66x+(-37)+(-23x)=49\n66x-37-23x=49\n43x-37=49\n43x=86\nx=86/43
364111
take the first derivative and set it equal to zero and solve.  2x +1 = 0 x= -1/2  solve for y.  y=-13/4\nvertex is at x= -13/4 y=-2
794469
1.5 +3 = 1.5 * 3\n7 + 1.1666667 = 7 * 1.1666667\n12 + (12/11) = 12 * (12/11)\nx + (x/(x-1))  = x * (x/(x-1)) for all real x's where -1 >= x  or x >= 2
988496
(2x)/7 = (x-1)/3  Multiply both sides by 21\n\n6x = 7x –7 (-7x from both sides)\n\n-x = -7\n\nx = 7
210777
X = -1\nY = ( 2/3)*(1/6) = 1/9\n\nX = 1\nY = (2/3)*(6^1) = 4\n\nX = 2\nY = (2/3)*(36) = 24
918458
Look at it this way:\n(-1)*(6x + 6x) = (-1)*(12x) = -12x
874921
-7x-2>=3x-21\nadding -3x+2\n-10x>=-19\n10x<=19\ndividing by10\nx<=1.9
942991
6+4x+6-3x=x\n\n12-12x= x/12x +12x\n\n12=13x\n\n12/13= x
922786
For all real numbers x:\n\n\n12 + x = 18\n\n-12 + 12 + x = -12 + 18\n\nx = 6\n\n{6}
708644
Use the quadratic formula.\nx1 = 1\nx2 = -1/2
856711
because this has 2 unknowns it cannot be solved.\n\nbut I can write  x in terms of b\n\n2x = 13-b\nor x =(13-b)/2