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7

Set 1: Systems Of Equations (Beginner)

Explanation

Answer: B

PROBLEM

Solve: x + y = 13, 2x + 5y = 50. Find y.

Solve: x + y = 13, 2x + 5y = 50. Find y.

A.

10

B.

8

✓ Correct
C.

7

D.

9

Detailed Explanation

Choice B is the best answer. Using elimination or substitution: y = 8

Why others are wrong:
A: 10 is incorrect because it does not satisfy the equation.
C: 7 is incorrect because it does not satisfy the equation.
D: 9 is incorrect because it does not satisfy the equation.
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