Question

Cálculos obrigatorios

Answer 1

(A)

x / 8 = 4

x = 4*8 = 32

S = {32}

(B)

7x - 4 = 5x + 6

7x - 5x = 6 + 4

2x = 10

x = 10/2 = 5

x = 5

S = {5}

(C)

10 = x/2

x = 2*10 = 20

x = 20

S = {20}

(D)

-10 = -8 + 7y

7y = -10 + 8

7y = -2

y = -2/7

S = {-2/7}

(E) o item e não dá pra ver na foto!

(F)

4x - 8 = 20

4x = 20 + 8

4x = 28

x = 28/4 = 7

x = 7

S = {7}