Step-by-step explanation:
First, apply the distributive property to the left side of the equation. Multiply each of the two numbers inside the parentheses by 12 and then combine those products. Next, solve as you would solve any two-step equation. To isolate \begin{align*}12x\end{align*} on the left side of the equation, add 24 from both sides.
The original formula is y=kx. k is the constant. That means the constant is 0.2.
Let a = Imani's weekly allownace
She spent half of her allowance, so she has half it left = a/2. She got $4 more from washing the car, so she has a/2 + 4 dollars which totals $12:
a/2 + $4 = $12
a/2 = $8
Solve for a.