Решите уравнения 1. 15x-3=10x+12 2. -2x-25=-5×-7 3. 4(5-2y)=2 (1-y) 4. 3y+ 16=8y 5....

Question

Решите уравнения
1. 15x-3=10x+12

2. -2x-25=-5×-7

3. 4(5-2y)=2 (1-y)

4. 3y+ 16=8y

5. 4x+(11,8-x)=8-7 (y-2)

6. 3y+2 (2y-3)=8-7 (y-2)

7. 2-5x=x+14

8. 5(y-7)=3 (y-4)-29

9. 11-5y=12-6y

Answer 1

1. 15x-3=10x+12
5x=15
x=3
2. -2x-25=-5×-7
-2x=35+25
2x=-60
x=-30
3. 4(5-2y)=2 (1-y)
20-8y=2-2y
-8y+2y=-18
-6y=-18
6y=18
y=3
4. 3y+ 16=8y
-5y=-16
5y=16
y=3,2