Question

3x(b+5)-27=15

x e inmultirea(:
b e numarul necunoscut(:
Rezolva ecuatia.

Answer 1

3×(b+5)-27=15
⇒3×(b+5)=15+27
⇒3×(b+5)=42
⇒(b+5)=42:3
⇒(b+5)=14
⇒b=14-5
⇒b=9.