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Jessica and Lucy are working on another systems of equations problem. This time, they have to solve this system of equations.

2x + 4y = 12

x + 3y = 15

The instructions say they must use elimination to solve the system.

Jessica says they should multiply the second equation by 2.

Lucy says they should multiply the second equation by -2.

Which one is correct?

Sagot :

none of them are correct