Question

Cuanto es$4x=90-x/2$

Answer 1

4x = 90 - x/2
4x = (90 * 2 - x)/2
4x = (180 - x)/2
2 (4x) = 180 - x
8x = 180 - x
8x + x = 180
9x = 180
x = 180/9
x = 20

Solución.
x = 20