Question

Resolvendo a equação abaixo, obtém-se:
A)x = 12
B)x = 3
C)x =6
D)x= 1

Answer 1

Resposta:

ITEM (A)

Explicação passo-a-passo:

$\frac{x}{4} + \frac{x}{3} = 7$

$12( \frac{x}{4} + \frac{x}{3} ) = 12 \times 7$

$12 \times \frac{x}{4} + 12 \times \frac{x}{3} = 84$

$\cancel{12} \times \frac{x}{ \cancel{4}} + 12 \times \frac{x}{3} = 84$

$3x + 12 \times \frac{x}{3} = 84$

$3x + \cancel{12} \times \frac{x}{ \cancel{3}} = 84$

$3x + 4x = 84$

$7x = 84$

$x = \frac{84}{7}$

$\red{ \boxed{\Large{x = 12}}}$

$\green{ \boxed{{\mathbb{ATT: ARMANDO}}}}$