Question

1. look at the equation $x - 7 = 10$. what operation could you use to isolate the variable?

a add 10 to both sides
b add 7 to both sides
c subtract 7 from both sides
d subtract 10 from both sides

Explanation:

Step1: Identify target variable

We need to isolate $x$ in $x - 7 = 10$.

Step2: Cancel the constant term

To eliminate $-7$ on the left, add 7 to both sides:
$x - 7 + 7 = 10 + 7$

Step3: Simplify to isolate $x$

$x = 17$, so the operation works.

Answer:

b. Add 7 to both sides