Question

(m-n)÷x=k,при140÷n=5,40-n=k+k+88=m

Answer 1

140÷5=28
n=28
40-28=12
k=12
12+12+88=112
m=112
(112-28)÷x=12
84÷x=12
84=12x
84÷12
x=7