Question

Solve 5(2x + 4) = 15. Round to the nearest thousandth.
PS: x+4 is the power for 2

Answer 1

$\qquad \qquad\huge \underline{\boxed{\sf Answer}}$

Let's solve for x ~

$\qquad \sf  \dashrightarrow \: 5(2x + 4) = 15$

$\qquad \sf  \dashrightarrow \: (5 \times 2x) + (5 \times 4) = 15$

$\qquad \sf  \dashrightarrow \: 10x + 20 = 15$

$\qquad \sf  \dashrightarrow \: 10x + 20 - 20 = 15 - 20$

$\qquad \sf  \dashrightarrow \: 10x = - 5$

$\qquad \sf  \dashrightarrow \: \dfrac{10x}{10} = \dfrac{ - 5}{10}$

$\qquad \sf  \dashrightarrow \: x = - \dfrac{ 1}{2}$

hence value of x is - 1/2