Question

(48-х):7=5 86-(2х+15)=39

Answer 1

$(48-x):7=5 \ 48-x=5*7 \ 48-x=35 \ x=48-35 \ x=13 \ \ 86-(2x+15)=39 \ 2x+15=86-39 \ 2x+15=47 \ 2x=47-15 \ 2x=32 \ x=32:2 \ x=16$