3x3 - 10x = 17x divide by x to both sides
3x2 - 10 = 17 add 10 to both sides
3x2 = 27 divide by 3 to both sides
x2 = 9
x = ±√9
x = ±3
6x - 4y
12x - 6 = 10x +2 12x - 10x = 2 + 6 2x = 8 x = 4
Rearrange: x2 - 10x + 25 = 0ie (x - 5)(x - 5) = 0x = 5Check: x2 = 25; 10x - 25 = 50 - 25 = 25. Job done
5 (2x - 1) = 10Eliminate parentheses on the left side of the equation:10x - 5 = 10Add 5 to each side:10x = 15Divide each side by 10:x = 1.5
-14x
6x - 4y
3x - 12 = 10x - 15 - 6x -10 3x - 12 = 4x -25 3x + 13 = 4x 13 = 4x - 3x 13 = x None?
7x + 8 = 10x - 2 ∴ 3x = 10 ∴ x = 10/3
x2-10x = 0 x(x-10) = 0 x = 0 or x = 10
0
-10x = -50 Divide both sides by -10 remembering that a minus divided by a minus the quotient then becomes positive: x = 5 So: -10*5 = -50
12x - 6 = 10x +2 12x - 10x = 2 + 6 2x = 8 x = 4
10x - 5x + 5x = 10x
Y = 10x 10x = 40 y = 40
Rearrange: x2 - 10x + 25 = 0ie (x - 5)(x - 5) = 0x = 5Check: x2 = 25; 10x - 25 = 50 - 25 = 25. Job done
5 (2x - 1) = 10Eliminate parentheses on the left side of the equation:10x - 5 = 10Add 5 to each side:10x = 15Divide each side by 10:x = 1.5
-14x