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If $2 x + 3 y = 13$ and $5 x - 2 y = 4$ , what is $x + y$ ?

Competition practiceAlgebra

A6
B−1
C5
D7

Step-by-Step Solution

Multiply to eliminate

y : 4 x + 6 y = 26, 15 x - 6 y = 12

, so

19 x = 38, x = 2, y = 3

.

Answer: C) 5

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