Solve the system using elimination.

5x-2y=15
7x+7y=-28

x=1 y=-5

Step-by-step explanation:

7(5x-2y=15) --->      35x-14y=105

2(7x+7y=-28) -->  + 14x+14y=-56

                               49x=49  --->x=1

5(1)-2y=15 ---> 5-2y=15 ---> -2y=10 ---> y=-5

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step-by-step explanation: