Question

№648 . -7-2(5Х-6)=-2 №649. -2=-9-2(-2х+1) №650. 10-2(-х-7)=9 №655. -2+3(1+2х)=-2х+3 №658. 5х-4=4-3(5-2х) №659 . 4-2(5+4х)=-х+1 №660. 10-3(1-7х)=-4х-8 №661. 10-3(-7+8х)=-2х-6 №663. -2+3(1+2х)=-2х+3 №657. 3х-10=2+6(5+4х) №658. 5х-4=4-3(5-2х) №659. 4-2(5+4х)=-х+1

Answer 1

№648
-7-2(5Х-6)=-2
-7-10X+12=-2
-10X+5=-2
-10X=-7
X=0,7

№649.
-2=-9-2(-2х+1)
-2=-9+4x-2
4x-11=-2
4x=9
x=2,25

№650.
10-2(-х-7)=9
10+2x+14=9
2x+24=9
2x=-15
x=-7.5

№655.
-2+3(1+2х)=-2х+3
-2+3+6x=-2x+3
6x+1=-2x+3
8x=2
x=0,25

№658.
5х-4=4-3(5-2х)
5x-4=4-15+6x
-x=-5
x=5

№659 .
4-2(5+4х)=-х+1
4-10-8x=-x+1
-7x=7
x=-1

№660.
10-3(1-7х)=-4х-8
10-3+21x=-4x-8
25x=-1
x=-1/25

№661.
10-3(-7+8х)=-2х-6
10+21-24x=-2x-6
-22x=-37
x=37/22

№663.
-2+3(1+2х)=-2х+3
-2+3+6x=-2x+3
8x=2
x=0,25

№657.
3х-10=2+6(5+4х)
3x-10=2+30+24x
-21x=42
x=-2

№658.
5х-4=4-3(5-2х)
5x-4=4-15+6x
-x=-5
x=5

№659.
4-2(5+4х)=-х+1
4-10-8x=-x+1
-7x=7
x=-1

Answer 2

Let's solve the equations one by one:

№648: -7 - 2(5x - 6) = -2

First, distribute the 2 into the parentheses:

-7 - 10x + 12 = -2

Combine like terms:

-10x + 5 = -2

Subtract 5 from both sides:

-10x = -7

Divide by -10:

x = 7/10

№649: -2 = -9 - 2(-2x + 1)

Distribute the 2 into the parentheses:

-2 = -9 + 4x - 2

Combine like terms:

4x - 11 = -2

Add 11 to both sides:

4x = 9

Divide by 4:

x = 9/4

№650: 10 - 2(-x - 7) = 9

Distribute the -2 into the parentheses:

10 + 2x + 14 = 9

Combine like terms:

2x + 24 = 9

Subtract 24 from both sides:

2x = -15

Divide by 2:

x = -15/2

№655: -2 + 3(1 + 2x) = -2x + 3

Distribute the 3 into the parentheses:

-2 + 3 + 6x = -2x + 3

Combine like terms:

7 + 6x = -2x + 3

Subtract 6x from both sides:

7 = -8x + 3

Subtract 3 from both sides:

4 = -8x

Divide by -8:

x = -4/8 = -1/2

№658: 5x - 4 = 4 - 3(5 - 2x)

First, distribute the 3 into the parentheses:

5x - 4 = 4 - 15 + 6x

Combine like terms:

5x - 4 = -11 + 6x

Subtract 5x from both sides:

-4 = -11 + x

Add 11 to both sides:

7 = x

№659: 4 - 2(5 + 4x) = -x + 1

Distribute the 2 into the parentheses:

4 - 10 - 8x = -x + 1

Combine like terms:

-6 - 8x = -x + 1

Add 8x to both sides:

-6 = 7x + 1

Subtract 1 from both sides:

-7 = 7x

Divide by 7:

x = -1

№660: 10 - 3(1 - 7x) = -4x - 8

Distribute the 3 into the parentheses:

10 - 3 + 21x = -4x - 8

Combine like terms:

7 + 21x = -4x - 8

Add 4x to both sides:

7 + 25x = -8

Subtract 7 from both sides:

25x = -15

Divide by 25:

x = -15/25 = -3/5

№661: 10 - 3(-7 + 8x) = -2x - 6

Distribute the 3 into the parentheses:

10 + 21 - 24x = -2x - 6

Combine like terms:

31 - 24x = -2x - 6

Add 24x to both sides:

31 = 22x