Question

(x➗2-1.55)✖️0.4=10➗2

Answer 1

（x/2-1.55）+0.4=10/2=5
x/2-1.55=5-0.4=4.6
x/2=4.6+1.55=6.15
x=6.15*2=12.3

Answer 2

(x÷2-1.55)×0.4=10÷2
解：
(x÷2-1.55)×0.4=5
x÷2-1.55=5÷0.4
x÷2-1.55=12.5
x÷2=12.5+1.55
x÷2=14.05
x=14.05×2
x=28.1