how much is      -12 - (-21) = ?
921909
9...two negative make a plus.
588312
-13 - (-10) + (-64) = -64\n\nThe Working : \n\n-13 - (-10) + (-64)\n=-13 + 10 - 64 = -67 \n\nNote:\nthe minus and minus in between 13 and 10 changed to a plus b'coz\n\n- and - = +\n\nBest of Luck !!
631112
how about you try this\n\n 20.20\n-19.99\n  0.21\n\nits just that simple
983612
First swap the variables, then solve for R again.\n\nv = (21/2) - (1/64)R^2\nR^2 = -64v + 672\nR = ±√(-64v + 672)
200519
+/- 1\n\nThe answer is not 1, because -1 * -1 = 1 also.
757452
x=-54\nthis one is incorrect.\ny=-2/3\nx=1\ny=54/2.7\ny=-2 ~
897552
the answer is -19. I'll let you work out why
101082
(x-1)/4 > 3\nx-1 > 12\nx > 13
171390
24/200=12/100=12%\n120/0.2 = 60/0.1 = 600
201905
Just do the long division. So, for 20/21,\n21 goes into 200 9 times with a remainder of 11.\nThen 21 goes into 110 5 times with a remainder of 5.\nThen into 50 2 times with a remainder of 8.\nThen into 80 3 times with a remainder of 17.\nThen into 170 8 times with a remainder of 2.\nThen into 20 0 times witha remainder of 20,\nthen it repeats, so the decimal expansion is\n\n.952380952380952380.....
1088452
= -14a+28-4(6a-5)\n= -14a +28-24a+20\n= -38a+48
358099
0.43 & 0.0062\n\nDivide by 100
235841
A(8) = 1/2 (-3)* 8 -1 = -12-1=-13
199621
that would be .72 * 162 = 478.24
952946
12=10-x\nadding -12\n0=-12+10-x\n=-2-x\nadd 2 \n2=-x\nmultiply by -1\nx=-2\n\n2.1-9=y+2\n-8=y+2\nadding -2\n-8-2=y\ny=-10\n\n3.yes you are on the right track
895696
21-15T=0\n-15T=-21\nT= -21/-15\n\n9a+6=0\n9a=-6\na=-6/9\n\n\nthat should help you get started
21204
> 13x+14=-5+12x\n> 13x - 12x = -14 -5\n> x= -19\n\nThe result is -19