The "answer" is the number that makes it true when you put it in place of 'x'.
-10x + 7 = -3
Subtract 7 from each side of the equation:
-10x = -10
Divide each side by -10 :
x = 1
10x+7=(-3) 10x=(-10) x=(-1)ans
7x = 3 x = 3/7
x2 + 10x + 21 = (x + 3)(x + 7)
If: 10x+7 = 5x+22 Then: 10x-5x = 22-7 And: 5x = 15 So: x = 3
x=-3
10x+7 = 5x+32 10x-5x = 32-7 5x = 25 x = 5
12x - 8 = 10x + 42x = 12x = 6
6-x+12 = 10x+7 6+12-7 = 10x+x 11 = 11x x = 1
x=-1 becaus: 12x+3=2x-7 10x+3=-7 (-2x) 10x=-10 (-3) x=-1 (divided by 10)
53
10x + 7 = 4x + 49 6x + 7 = 49 6x = 42 x = 6
3x - 7 = 5x + 133x - 5x = 13 + 7-2x = 20x = -10x=-3