Question

Помогите!
Решите уравнения

Answer 1

1)1 2/7x+1 3/7=2 5/14
9/7x+10/7=33/14 |*14
9/7x*14+10/7*14=33/14*14
18x+20=33
18x=33-20
18x=13
x=13/18
2)2 2/5*(3/8x-1/4)=4,5
12/5*(3/8x-1/4)=4,5 |*40
96*(15x-10)=180
1440x-960=180
1440x=180+960
1440x=1140
x=1140/1440
x=19/24