Question

Помогите пожалуйста.
Заранее спасибо.

Answer 1

1)(1/3+1/2)×x=3.75
5/6×x=3.75
x=3.75:5/6
x=375/100:5/6
x=15/4×6/5
x=3/4×6
x=3/2×3
x=9/2
x=4.5

2)(3/5-0.25)×x=4.9
(3/5-25/100)×x=4.9
(3/5-1/4)×x=4.9
12-5/20×x=4.9
7/20×x=4.9
x=4.9÷7/20
x=7×20
x=140