Question

(50+X) ORI 15=100 CUM SE AFLA ,,X''

Answer 1

(50+x)•15=100
15x+750=100
15x=100-750
15x=-650
x=-650:15
x=-43,(3)

Answer 2

$15(50+x)=100$
$50+x=\frac{100}{15}$
$x=\frac{100}{15}-50=\frac{100-750}{15}=\frac{-650}{15}=\frac{-130}{3}$