algebra 2
posted by Anonymous .
to solve the system of equations which expression could be substituted for x into the first equation? first: 2x+7y=10 second: x2y=15

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.