2x-3 = 10x-99
start by moving the terms with variables (x) on one side of the equal sign, and the constants (regular number, with no variables) to the other side. Do this by addition and subtraction.
2x-3 = 10x-99
+99 +99
now you have
2x +96= 10x
now get both of the variables on the right side
2x+96 = 10x
-2x -2x
now you have
96 = 8x
now solve for x by dividing each side by 8
96/8 = 8x/8
x= 12
2x-3 = 21+10x 2x-10x = 21+3 -8x = 24 x = -3
10x - 3 - 2x = 4 7x - 3 = 4 7x = 7 x = 1
x=-1 becaus: 12x+3=2x-7 10x+3=-7 (-2x) 10x=-10 (-3) x=-1 (divided by 10)
2x/3 = 8 + 4x2x = 24 + 12x-24 = 10x-2.4 = x
10x-7y=-110x+1=7y-2x -10x-1=-25-12x-1=-25-12x=-24x=-24/-12x=210(2)-7y=-120-7y=-121=7y21/7=yy=3
2x-3 = 21+10x 2x-10x = 21+3 -8x = 24 x = -3
2x-3=10x+21 2x-3-2x=10x+21-2x -3=8x+21 -3-21=8x+21-21 -24=8x -3=x
10x - 3 - 2x = 4 7x - 3 = 4 7x = 7 x = 1
12x-3=2x+17 10x-3=17 10x=20 x=2
x=-1 becaus: 12x+3=2x-7 10x+3=-7 (-2x) 10x=-10 (-3) x=-1 (divided by 10)
-2(5x+3)-2x<-3(2x-4)+2
13 + 2x = 32x = 3 - 132x = -10x = -5
y=-10x-4
2x/3 = 8 + 4x2x = 24 + 12x-24 = 10x-2.4 = x
x -3x + 4 = 3 - 9-2x + 4 = -6-2x = -102x = 10x = 5
2x2 + 7x - 15 = 02x2 + 10x - 3x - 15 = 0(2x2 - 3x) + (10x - 15) = 0x(2x - 3) + 5(2x - 3) = 0(2x - 3)(x + 5) = 0(2x - 3) = 0 or (x + 5) = 0x = 3/2 or x = -5
10x-7y=-110x+1=7y-2x -10x-1=-25-12x-1=-25-12x=-24x=-24/-12x=210(2)-7y=-120-7y=-121=7y21/7=yy=3