Question

Stiind ca a+b = 11 , determinati numarul x din :
a+ x* b + x * a + b = 132

Answer 1

a+ x* b + x * a + b = 132
a(1+x)+b(1+x)=132
(a+b)(1+x)=32
dar    a+b = 11⇒   
11(1+x)=32
11+11x=32
11x=32-11
11x=21

x=21/11