Question

1- Resolva:



a) x + 4 = 9
b) 3(x – 1) = 2x +
c) 2x + 13x = 75
d) 3x + √ 49 = 5(x – 1)​

Answer 1

Resposta:ch segunda

Explicação passo-a-passo:

Answer 2

Resposta:

Explicação passo-a-passo:

$x+4=9\\ x=9-4\\x=5\\\\3(x-1)=2x\\3x-3=2x\\3x-2x=-3\\x=-3\\\\2x+13x=75\\15x=75\\x=\frac{75}{15}\\ x=5\\\\3x+\sqrt{49}=5(x-1)\\ 3x+7=5x-5\\3x-5x=-5-7\\-2x=-12\\x=\frac{-12}{-2}\\ x=6$