Home » Test Prep » ACT Section 2: Math » If 4x + 5 = 15, then 10x + 5 =:
If 4x + 5 = 15, then 10x + 5 =:
A. 2.5.
B. 15.
C. 22.5.
D. 25.
E. 30.
Correct Answer: E
Explanation/Reference:
Explanation:
If 4x + 5 = 15, then 4x = 10 and x = 2.5. Substitute 2.5 for x in the second equation: 10 x 2.5 + 5 = 25 + 5 = 30.
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