Question

Resolva as equações:
a) 3(x-1)-7=15
b) 3(3x-1)=2(3x+2)​

Answer 1

Resposta:

a)

$\sf{3(x-1)-7=15}$

$\sf{3x - 3 - 7 = 15}$

$\sf{3x - 10 = 15}$

$\sf{3x = 15 + 10}$

$\sf{3x = 25}$

$\sf{25 \div 3}$

$\rightarrow\boxed{\boxed{\sf{x = \frac{25}{3} }}}\checkmark$

b)

$\sf{3(3x-1)=2(3x+2)}$

$\sf{9x - 3 = 2(3x + 2)}$

$\sf{9x - 3 = 6x + 4}$

$\sf{9x - 3 - 6x = 4}$

$\sf{9x - 6x = 4 + 3}$

$\sf{3x = 4 + 3}$

$\sf{3x = 7}$

$\sf{7 \div 3}$

$\rightarrow\boxed{\boxed{\sf{x = \frac{7}{3} }}}\checkmark$

Explicação passo-a-passo:

(espero ter colaborado)