Question

Me ajudem Pf e pra manhã!​

Answer 1

Resposta:

1) 3x = 18

x =18 : 3

x = 6

2. 6 - a = 27

a = 27 + 6

a = 33

3. x + 7 = -12

x = -12 -7

x = -19

4. 9 - y = -18

y = -18 +9

y = -9

5. 6 - a = 27

a = 27 + 6

a = 33

6. y + 15 = - 35

y = -35 -15

y = -50

7.9 - 3x = -4x

9 = 3x + 4x

9=7x

x = 9/7 (nove sobre sete)

8. 12 - 2x = -18

12 + 18 = 2x

30 = 2x

x = 30/2

x = 15

9. 4a - 12 = -16

4a = 12 + 16

4a = 28

a = 28/4

a = 7

10. 7w + 15 = -34

7w = -15 -34

7w = -49

w = -49/7

w = -7

11. -31 + 4a = -55

4a = 31 + (-55)

4a = - 24

a = -24/4

a = -6