Question

(1,2×-3,5)*3+4,25=5,27

Answer 1

(1,2x-3,5)*3=5,27-4,25
(1,2x-3,5)*3=1,02
1,2x-3,5=1,02:3
1,2x-3,5=0,34
1,2x=0,34+3,5
1,2x=3,84
x=3,84:1,2
x=3,2