Question

Помогите даю 30 баллов!!!

Answer 1

1. 2х-4=0⇒х=2; 5х=4⇒х=4/5; 1-х=0⇒х=1

2. 8-4х+12=5х-7⇒27=9х⇒х=3

3. 28х-25х=18; 3х=18⇒х=6

4. -3.5=2.1х⇒х=-35/21; х=-7/3; х=-2 1/3

5. 10х+15=12х-4; 19=2х; х=9.5

6. 4х+1=-7; х=-8/4; х=-2

4х+1=7; х=6/4; х=1.5