Question

1. Resolva as equações abaixo:
a) 2x – 9 = 5x + 6
b) 2x – 6 = 0
c) 4x – 15 = 0

Answer 1

Explicação passo-a-passo:

a)

$\sf 2x-9=5x+6$

$\sf 2x-5x=6+9$

$\sf -3x=15$

$\sf x=\dfrac{15}{-3}$

$\sf x=-5$

b)

$\sf 2x-6=0$

$\sf 2x=6$

$\sf x=\dfrac{6}{2}$

$\sf x=3$

c)

$\sf 4x-15=0$

$\sf 4x=15$

$\sf x=\dfrac{15}{4}$

$\sf x=3,75$