Question

Calcule a medida de x nas seguints figuras: a) 3x+20=×

Answer 1

3x+20=x 3x-x=-20 2x=-20 X=-20/2 X=-10

Answer 2

$3x + 20 = x \\ 3x - x + 20= 0 \\ 2x + 20 = 0 \\ 2x = - 20 \\ x = \frac{ - 20}{2} \\ x = - 10$