Question

Resolvendo a equação X/2+2(x – 1) = 8 – (x – 4),
a) 4
b) – 4
c) 2
d) – 2
e) 1

Answer 1

Explicação passo-a-passo:

$\sf \dfrac{x}{2}+2\cdot(x-1)=8-(x-4)$

$\sf \dfrac{x}{2}+2x-2=8-x+4$

$\sf \dfrac{x}{2}+2x+x=8+4+2$

$\sf \dfrac{x}{2}+3x=14$

$\sf x+2\cdot3x=2\cdot14$

$\sf x+6x=28$

$\sf 7x=28$

$\sf x=\dfrac{28}{7}$

$\sf x=4$

Letra A