Решите уравнение 1,8-(2 3/5 -(x-1,2))=3 1,9-(5 3/4-(x+1))=3,15

Question

Решите уравнение 1,8-(2 3/5 -(x-1,2))=3

1,9-(5 3/4-(x+1))=3,15

Answer 1

1,8-(2 3/5 -(x-1,2))=3
1,8-(2,6-x+1,2)=3
1,8-(3,8-x)=3
1,8-3,8+x=3
-2+x=3
x=3+2
x=5


1,9-(5 3/4-(x+1))=3,15
1,9-(5,75-x-1)=3,15
1,9-(4,75-x)=3,15
1,9-4,75+x=3,15
-2,85+x=3,15
x=3,15+2,85
x=6