Answered

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-2x - y = -9
5x - 2y = 18
Solve as a whole number.

Sagot :

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-y = -9 + -2x

y = 9 - 2x

5x - 2( 9 - 2x ) = 18

5x - 18 - 2x = 18

5x - 2x = 18 + 18

7x/7 = 36/7

approximately 5

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