solve equations?

1)
x + 1 = 2x + 2
x + 1 = 2x + 2
- 1 = x

2)
9x + 63 = 10x - 14
77 = x

3)
3x + 12 = 5x - 10
22 = 2x
x = 11

1) x+1 = 2(x+1)

2x + 2 = x + 1

2x - x = 1 - 2

x = - 1


2) 9(x+7)= 2(5x-7)

9x + 63 = 10x - 14

10x - 9x = 63 + 14

x = 77


3) 3(x+4)= 5(x-2)

5(x - 2) = 3(x + 4)

5x - 10 = 3x + 12

5x - 3x = 12 + 10

2x = 22

x = 11

1) x + 1 = 2(x + 1)
x + 1 = 2x + 2
- x = 1
or
x = - 1.

the rest of these are your homework, not mine.

(x+1) = 2(x+1)
(x+1) - (x+1) = 2(x+1) - (x+1)
0 = x+1
x = -1

Here's #3:
Expand terms on both sides, giving 3x + 12 = 5x - 10.
Subtract 3x from both sides, giving
12 = 2x - 10.
Add 10 to both sides, giving
22 = 2x.
Divide both sides by 2, giving
x = 11.

The others are done in the same way. Good luck, and good studying!