Question

resolva as equações 1) 5x+40=20 2) 3x+7=26 3) 4x+5=37 4) 2x+15=31 5) 8x+6=30 6) 7x+7=42 7) 12x+40=160 8) 3x+17=11 9) 5x+25=65 10) 4x+11=55. Alguém me ajuda*-* pls

Answer 1

1) 5x + 40 = 20

5x = 20 - 40

5x = -20

x = -20/5

x = -4

2) 3x + 7 = 26

3x = 26 - 7

3x = 19

x = 19/3

3) 4x + 5 = 37

4x = 37 - 5

4x = 32

x = 32/4

x = 8

4) 2x + 15 = 31

2x = 31 - 15

2x = 16

x = 16/2

x = 8

5) 8x + 6 = 30

8x = 30 - 6

8x = 24

x = 24/8

x = 3

6) 7x+7=42

7x = 42 - 7

7x = 35

x = 35/7

x = 5

7) 12x + 40 = 160

12x = 160 - 40

12x = 120

x = 120/10

x = 12

8) 3x + 17 = 11

3x = 11 - 17

3x = - 6

x = -6/3

x = -2

9) 5x + 25 = 65

5x = 65 - 25

5x = 40

x = 40/5

x = 8

10) 4x + 11 = 55

4x = 55 - 11

4x = 44

x = 44/4

x = 11