Question

a:b=4 rest7   a-b=88   a+b=?

Answer 1

[tex]a:b=4~rest~7 \Longrightarrow a=4b+7 \\ a-b=88~~~~~~ \Longrightarrow a=b+88 \\ Egalam: \\ 4b+7=b+88 \\ 3b=81 \\ \underline{b=27} \\ a=27+88 \\ \underline{a=115} \\ a+b=115+27 \\ \boxed{a+b=142} [/tex]