Question

Urgente
Encontre o valor de x:
A- 2x - 4 x + 10 = x - 20
B- 5x + 3 x - 20 = 4 - 3 . 10 + x

Answer 1

A) 2x - 4x + 10 = x - 20

-2x + 10 = x - 20

-2x - x = -20 -10

-3x = -30 •(-1)

3x = 30

x = 10

B) 5x + 3x - 20 = 4 - 3 • 10 + x

8x - 20 = 4 - 30 + x

8x - x = - 26 + 20

7x = -6

x = -6

7