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solve the following systemof equations . . . 2x+5y=16
-5x-2y=2
2x + 5y = 16 both sides times 2 —> 4x + 10y = 32
–5x – 2y = 2 both sides times 5 —> –25x – 10y = 10
add the two new equations to obtain 21x = 42
x = – 2
substitute –2 into original equation 2x + 5y = 16
2 (–2) + 5y = 16
–4 + 5y = 16
5y = 20
y = 4
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