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5

Set 3: Systems Of Equations (Beginner)

Explanation

Answer: C

PROBLEM

Solve: 2x + 2y = 30, 4x + 5y = 68. Find y.

Solve: 2x + 2y = 30, 4x + 5y = 68. Find y.

A.

6

B.

10

C.

8

✓ Correct
D.

9

Detailed Explanation

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

Why others are wrong:
A: 6 is incorrect because it does not satisfy the equation.
B: 10 is incorrect because it does not satisfy the equation.
D: 9 is incorrect because it does not satisfy the equation.
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