Question

Efetue as equações:
a) 2x - 3=7(x-4).
b) x + 11 = 6(x – 19)
c) 7(x + 10) – 8(X + 8) = 0
d) 6(x – 3) – 9(x - 5) = x - 1​

Answer 1

Resposta:

Explicação passo-a-passo:

a) 2x - 3=7(x-4)

2x - 3 = 7x - 28

7x - 2x = 28 - 3

5x = 25

x = 25/5

x = 5

b) x + 11 = 6(x – 19)

x + 11 = 6x - 114

6x - x = 114 + 11

5x = 125

x = 125/5

x = 25

c) 7(x + 10) – 8(X + 8) = 0

7x + 70 - 8x + 64 = 0

-x = -70 - 64

-x = -134 .(-1)

x = 134

d) 6(x – 3) – 9(x - 5) = x - 1​

6x - 18 - 9x - 45 = x - 1

6x - 9x - x = 18 + 45 - 1

-4x = 62

-x = 62/4

-x = 15,5 . (-1)

x = -15,5