В) -а•(-3-5)+3а=11 г) (-х-4)-(-2х-20)=10 д) 3/4b+(1/4b+3b)=-8 е) (1/4х+5)-(-3/4х-7)=5,2...

Question

В) -а•(-3-5)+3а=11
г) (-х-4)-(-2х-20)=10
д) 3/4b+(1/4b+3b)=-8
е) (1/4х+5)-(-3/4х-7)=5,2
Помогите пожалуйста!!!)))

Answer 1

В)3а+5а+3а=11
11а=11
а=1
г)-х-4+2х+20=10
х=10-20+4
х=-6
д)3/4b+1/4b+3b=-8
4b=-8
b=-2
е)1/4х+5+3/4х+7=5,2
х=5,2-7-5
х=-6,8