Set 3: Systems Of Equations (Beginner)

**Choice B is the best answer.** Using elimination or substitution: y = 5

Explanation

Answer: B

PROBLEM

Solve: x + 2y = 15, x + 3y = 20. Find y.

✓ Correct

Detailed Explanation

Choice B is the best answer. Using elimination or substitution: y = 5

Why others are wrong:

A: 4 is incorrect because it does not satisfy the equation.

C: 3 is incorrect because it does not satisfy the equation.

D: 6 is incorrect because it does not satisfy the equation.