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

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IzzyTitanOwO IzzyTitanOwO · Answer 1 · 2020-02-08T00:01:02+01:00

Answer: 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:

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raphealnwobi raphealnwobi · Answer 2 · 2022-05-27T11:17:22+02:00

The substitution method was used to solve the equation x + y = 390 and 2x + 4y = 1260 which gives x = 150 and y = 240

An equation is an expression that shows the relationship between two or more numbers and variables.

Given the equations:

x + y = 390 (1) and 2x + 4y = 1260 (2)

From 1, x = 390 - y, substitute in equation 2:

2(390 - y) + 4y = 1260

780 + 2y = 1260

y = 240

Put y = 240 in equation 1:

x + 240 = 390

x = 150

The substitution method was used to solve the equation x + y = 390 and 2x + 4y = 1260 which gives x = 150 and y = 240

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