Question

Twice the sum of a number and six is eight

Answer 1

This can be represented as:
$2(x + 6) = 8$
Open the bracket:
$2x + 12 = 8$
Collect like terms:
$2x = 8 - 12$
Simplify :
$2x = - 4$
Divide both sides by 2:
$x = - 2$
You can check the answer by inputting - 2 in the first equation:
$2( - 2 + 6) = 8$
$2(4) = 8$
$8 = 8$
Hope I helped you! ☺️