Question

Помогите решить примеры:
(-2,5+3 2/3) :(-2 11/12)
-1,8х+2,5=0,7х+16
-3(2х-0,8)=2(х+3,6)

Answer 1

1)=(-2 1/2+3 2/3)÷(-2 11/12)=
=(-5/2+11/3)÷(-35/12)=
=(-15/6+22/6)×(-12/35)=
=7/6×(-12/35)=-2/5

2)
-1.8х-0.7х=16-2.5
-2.5х=13.5
х=13.5÷(-2.5)
х=-5.4

3)
-6х+2.4=2х+7.2
-6х-2х=7.2-2.4
-8х=4.8
х=4.8÷(-8)
х=-0.6