Question

What is the value of x in 3(x-4)=-21

Answer 1

`3(x-4)=-21`

Solve for x:

Use distributive property on the left hand side:

`3x-12=-21`

Add 12 to both sides:

`\begin{gathered} 3x-12+12=-21+12 \\ 3x=-9 \\ \end{gathered}`

Divide both sides by 3:

`\begin{gathered} (3x)/(3)=-(9)/(3) \\ x=-3 \end{gathered}`

Answer:

x = -3