Question

Calcule e responda
1) 4x - 10 = 2x + 2
2) x + 2x + 3 - 5x = 4x - 9
3) 3( x - 2 ) = 2x - 4
4) 2x + 3x + 9 = 8(6 - x)
5) 7 (x - 1) - 2 (x - 5) = x - 5
6) 2 (3 - x) = 3 (x -4) + 15
7) ( 4x + 6) - 2x = (x - 6) + 10 + 14
8) 5( x - 3 ) - 4 ( x - 2 ) = 2 + 3( 1 - 2x)
9) 7x - 4 - x = -7x + 8 - 3x

Answer 1

1) 4x - 10 = 2x + 2
4x - 2x = 2 + 10
2x = 12
x = 12/2
x = 6

2) x + 2x + 3 - 5x = 4x - 9
x + 2x - 5x - 4x = - 9 - 3
6x = - 12
x = - 2

3) 3( x - 2 ) = 2x - 4
3x - 6 = 2x - 4
3x - 2x = - 4 + 6
x = 2

4) 2x + 3x + 9 = 8(6 - x)
2x + 3x + 9 = 48 - 8x
2x + 3x + 8x = 48 - 9
13x = 39
x = 39/13
x = 3

5) 7 (x - 1) - 2 (x - 5) = x - 5
7x - 7 - 2x + 10 = x - 5
7x - 2x - x = - 5 + 7 - 10
4x = - 8
x = - 2

6) 2 (3 - x) = 3 (x -4) + 15
6 - 2x = 3x - 12 + 15
- 2x - 3x = - 12 + 15 - 6
- 5x = - 3 . (-1)
5x = 3
x = 3/5

7) ( 4x + 6) - 2x = (x - 6) + 10 + 14
4x + 6 - 2x = x - 6 + 10 + 14
4x - 2x - x = - 6 + 10 + 14 - 6
x = 12

8) 5( x - 3 ) - 4 ( x - 2 ) = 2 + 3( 1 - 2x)
5x - 15 - 4x + 8 = 2 + 3 - 6x
5x - 4x + 6x = 2 + 3 + 15 - 8
7x = 12
x = 12/7

9) 7x - 4 - x = -7x + 8 - 3x
7x - x + 7x + 3x = 8 + 4
16x = 12
x = 3/4

Espero ter ajudado :)

Answer 2

1).4x-10=2x+2
4x-2x=2+10
2x=10
x=10/2
x=5
2) x+2x+3-5x=4x-9
x+2x-5x-4x=-9-3
3x-9x=-12
-6x=-12.(-1)
6x=12
x=12/6
x=2
3) 3(x-2)=2x-4
3x-6=2x-4
3x-2x=-4+6
x=2
4) 2x+3x+9=8(6-x)
2x+3x+9=48-8x
2x+3x+8x=48-9
13x=39
x=39/13
x=3
5) 7(x-1)-2(x-5)=x-5
7x-7-2x+5=x-5
7x-2x-x=-5-5+7
7x-3x=-10+7
4x=-3
x=-3/4
6) 2(3-x)=3(x-4)+15
6-2x=3x-12+15
-2x-3x=-12+15-6
-5x=3-6
-5x=-3.(-1)
5x=3
x=3/5
7) (4x+6)-2x=(x-6)+10+14
4x+6-2x=x-6+10+14
4x-2x-x=-6+10+14-6
4x-3x=4+8
x=12
8) 5(x-3)-4(x-2)=2+3(1-2x)
5x-15-4x+8=2+3-6x
5x-4x+6x=2+3-8+15
5x+2x=5+7
7x=12
x=12/7
9) 7x-4-x=-7x+8-3x
7x-x+7x+3x=8+4
6x+10x=12
16x=12
x=12/16 (:4)
x=3/4