Question

1)2x=-7
2)3x+2=2x-11
3)2x=16
4)x/2=-5( como se fosse fração esse x/2)
5)2x+14=5x-1
6)4x-5=6x+11
7)5x+4-2x=26x3
8)5m-7-2m-2=0
9)w-8+5y=x3+y2+7
10)4t+9=3t+5
11)-10+4-2×=4x-7
12)10x-8-2=7x-4​

Answer 1

Resposta:

1) 2x = -7

x = -7/2 = -3,5

2) 3x + 2 = 2x - 11

3x - 2x = -11 - 2

x = -13

3) 2x = 16

x = 16/2 = 8

4)

5) 2x + 14 = 5x - 1

2x - 5x = -1 - 14

-3x = -15 .(-1)

x = 15/3 = 5

6) 4x - 5 = 6x + 11

4x - 6x = 11 + 5

-2x = 16 .(-1)

x = -16/2 = -8

7) 5x + 4 - 2x = 26 x 3

5x - 2x = 26 x 3 - 4

3x = 78 - 4

x = 74/3 = 24,6

8) 5m - 7 - 2m - 2 = 0

5m - 2m = 0 + 7 + 2

3m = 9

m = 9/3 = 3

9)

10) 4t + 9 = 3t + 5

4t - 3t = 5 - 9

t = -4

11) -10 + 4 - 2x = 4x -7

-2x - 4x = -7 + 10 - 4

-6x = -1 .(-1)

x = 1/6

12) 10x - 8 - 2 = 7x - 4

10x - 7x = -4 + 8 + 2

3x = 6

x = 6/3 = 2