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OpenStudy (cenaida):
If y = x + 4, simplify the expression x + 2y. A. 3x + 4 B. 3x + 8 C. 2x + 4 D. x + 4 + 2y
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OpenStudy (anonymous):
x + 2(x + 4) = x + 2x + 8 = 3x + 8
OpenStudy (anonymous):
make substitution in for y = x+4 in x + 2y , then use algebra to clean up and you get your answer.
OpenStudy (anonymous):
B.
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