Question

Find the value of 2u+7 given that -7u-5=2Simplify answer as much as possible2u+7=

Answer 1

Solve for u using the equation -7u - 5 = 2

$\begin{gathered} -7u-5=2 \\ -7u=2+5 \\ -7u=7 \\ \frac{-7u}{-7}=\frac{7}{-7} \\ u=-1 \end{gathered}$

Now that we know the value of u, substitute it to the expression 2u + 7.

$\begin{gathered} 2u+7=? \\ =2(-1)+7 \\ =-2+7 \\ =5 \\ \\ \text{Therefore, }2u+7=5 \end{gathered}$