Question

a*b+c=79
c:b=75
a*b=4

Answer 1

4+c=79 c=79-4=75;; c=75;;75:b=75 b=75:75 b=1;;;;a×1+75=79 ; a×1=79-75 a×1=4 a=4:1 a=4

Answer 2

axb+c=79
c:b=75  ⇒ b=75:c
axb=4  ⇒ a= 4:b
4+c=79
c=79-4
c=75
b=75:75
b=1
a=4:1
a=4
v: 4x1+75=4+75=79