Question

2x+3x=20. 3x+10-2x=30. 5x+20=3x-10. 4x+2x+12-10=40+8-4x-16

Answer 1

Explicação passo-a-passo:

a)

$2x + 3x = 20$

$5x = 20$

$x = \frac{20}{5}$

$x = 4$

b)

$3x + 10 - 2x = 30$

$3x - 2x = 30 - 10$

$x = 20$

c)

$5x + 20 = 3x - 10$

$5x - 3x = - 10 - 20$

$2x = - 30$

$x = \frac{ - 30}{2}$

$x = - 15$

d)

$4x + 2x + 12 - 10 = 40 + 8 - 4x - 16$

$4x + 2x + 4x = 40 + 8 - 16 - 12 + 10$

$10x = 30$

$x = \frac{30}{10}$

$x = 3$