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Solving One-Step Equations: Addition and Subtraction

Question 1 • SC-Mathematics 6

Which steps would you use to solve this equation? Check all that apply.p + 7 = 12

Answer
A
Subtract 7 from both sides of the equation.
B
Subtract 7 from 7.
C
7 – 7 = 0 and 12 – 7 = 5, so p = 5.
D
Substitute 12 for p to check the solution.
E
Substitute 5 for p to check the solution.

Explanation

Subtract 7 from both sides of p + 7 = 12 to isolate p. Since 7 − 7 = 0 and 12 − 7 = 5, the solution is p = 5. You can check it by substituting 5 for p: 5 + 7 = 12, so the equation is true.

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