Question

stiind ca a-b=4, rezolvati ecuatiile , unde x este numar natural 
x+2a -2b=8
x+1=30+5a-5b

Answer 1

x+2(a-b)=8
a-b=4
x+2*4=8
x=8-8
x=0

x+1=30+5(a-b)
x+1=30+5*4
x+1=50
x=51