Explain which method you used for solving the system of equations in which x represents the number of bottles of water sold and y represents the number of sandwiches sold. x + y = 390 and 2x + 4y = 1260

Sample Response :Use the linear combination method.

Multiply the first equation by –2 to create opposite terms for x.

Multiply the first equation by –4 to create opposite terms for y.

Add the system of equations to eliminate a variable.

Step-by-step explanation:

Sample Response:  I used the linear combination method because both equations were in standard form. Before adding the equations together, I multiplied the first equation by –2 to eliminate x.

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step-by-step explanation:

i wish i could u