Question

Ex 5 urgenttttttttt plz

Answer 1

[(X+15)×10 -100]:5+90=100
[(X+15)×10-100]:5=10
(X+15)×10-100=50
(X+15)×10=150
X+15=15
X=0
V [(0+15)×10-100]:5+90=
(15×10-100):5+90=
(150-100):5+90=
50:5+90=
10+90=100
Deci varianta corecta este b)