Answer:
The addition property of equality
Step-by-step explanation:
According to the addition property of equality, if we add the same number to each side of an equation, the equality is still true.
We are given the equation
x – 3 = 7, and we must solve for x.
We want to get x by itself, so we add 3 to each side.
x – 3 + 3 = 7 + 3
x = 10
We have just used the addition property of equality.
