Question

linear equations w/ distribution (lev 1)
score: 4/5 penalty: none
question
solve.
7(z - 10) = -7

Explanation:

Step1: Apply distributive property

$$7(z - 10)=7z-70$$
So the equation becomes $7z - 70=-7$.

Step2: Add 70 to both sides

$$7z-70 + 70=-7 + 70$$
$$7z=63$$

Step3: Divide both sides by 7

$$\frac{7z}{7}=\frac{63}{7}$$
$$z = 9$$

Answer:

$z = 9$