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8

Set 1: Systems Of Equations (Intermediate)

Explanation

Answer: A

PROBLEM

Solve: 3x + 2y = 42, 2x + 5y = 50. Find x.

Solve: 3x + 2y = 42, 2x + 5y = 50. Find x.

A.

10

✓ Correct
B.

8

C.

12

D.

9

Detailed Explanation

Choice A is the best answer. Using elimination or substitution: x = 10

Why others are wrong:
B: 8 is incorrect because it does not satisfy the equation.
C: 12 is incorrect because it does not satisfy the equation.
D: 9 is incorrect because it does not satisfy the equation.
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