Question

(A) 7x + 5 = 68 – 2x
(B) 8x – 9 = 2x + 11
(C) 3y - 8 = 13
(D) 8x – 12 = 5x + 15​

Answer 1

Resposta:

a) x = 7

b) x = 20/6

c) y = 7

d) x = 9

Explicação passo-a-passo:

a) 7x+5 = 68-2x

7x+2x = 68-5

9x = 63

x = 63/9

x = 7

b) 8x-9 = 2x+11

8x-2x = 11+9

6x = 20

x = 20/6

c) 3y-8 = 13

3y = 13+8

3y = 21

y = 21/3

y = 7

d) 8x-12 = 5x+15

8x-5x = 15+12

3x = 27

x = 27/3

x = 9

Espero ter ajudado