Question

Rezolvati ecuatia :
x + $\frac{4}{5}$ din x =90

Answer 1

aducem la acelasi numitor, amplificam x si 90 cu 5

$\frac{5x}{5}+ \frac{4x}{5}= \frac{450}{5}$

5x+4x=450
9x=450
x=450:9
x=50

Answer 2

5/5*x+4/5*x =90
9/5*x=90
x= 90*5/9
x=50