Question

1)-2x+16=5x+30 уравнение
2)3 1/4x-4 5/7=3 5/12x-3 3/14
5/12-7/9x=10 5/12-3x

Answer 1

1) -2х+16=5х+30  
-2х+5х=30-16
7х=14
х=14:7
х=2