# algebra 2

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to solve the system of equations which expression could be substituted for x into the first equation? first: 2x+7y=10 second: x-2y=15

• algebra 2 -

x = 15+2y

2x+7y=10

Substitute 15+2y for x in second equation and solve for y. Insert that value into the first equation and solve for x. Check by inserting both values into the second equation.

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