Question

1) 1,8x-6x+7=7-6x
2) 1,5-2x-3=6-0,5
3) 5-2 (3x+11)=7
4) 2x-(3x+5)=-5
5) 10(0,3x+0,4)=1
6) 1-5(2-x)=2+7x-9
7) 3-4 (2x-5)=23-8x

Answer 1

1) 1,8x-6x+7=7-6x 1.8х-6х+6х=7-7 1.8х=0 Х=0:1.8 Х=0 2) 1,5-2x-3=6-0,5 -2х=6-0.5-1.5+3 2х=7 Х=7:2 Х=3.5 3) 5-2 (3x+11)=7 5-6х-22=7 -6х=7-5+22 6х=24 Х=24:6 Х=4 4) 2x-(3x+5)=-5 2х-3х-5=-5 2х-3х=-5+5 -1х=0 Х=0 5) 10(0,3x+0,4)=1 3х+4=1 3х=1-4 3х=-3 Х=-3:3 х=-1 6) 1-5(2-x)=2+7x-9 1-10+5х=2+7х-9 5х-7х=2-9+10-1 -2х=2 Х=2/-2 Х=-1 7) 3-4 (2x-5)=23-8x 3-8х+20=23-8х -8х+8х=23-20-3 0=0

Answer 2

3) 5-2 (3x+11)=7