Question

Daca a-5b=7 atunci aflati x din relatiile
a)x+3a-15b=29
b)x-123+5a-25b=137
c)x-2a+10b+17=4
d)47-x+7a-35b=2a-10b+4

Answer 1

x+3(a-5b)=29    x+3*7=29   x+21=29   x=29-21   x=8                                          x-123+5(a-5b) =137  x-123+5*7=137  x=137+123-35=225