Question

{[(290•a+100):30-70]•4+60}:36=5

Cât e a?

Answer 1

[(290a+100):30-70]x4+60=180/-60
[(290a+100):30-70]x4=120/:4
(290a+100):30-70=30/+70
(290a+100):30=100/x30
290a=300/-100
290a=200/:290
a=1,45