Question

3 si 4 vă rog urgent

Answer 1

3) a+b=90
    a=b*5
5*b+b=90
6*b=90, deci b=90/6=15
a=15*5=75

4)a+b=63
a=8b
8*b+b=63
9*b=63 deci b=63:9=7
a=7*8=56