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Mathematics, 22.05.2020 20:00 fluffyanimal456

Serina wants to solve the following system of equations in the most efficient way.

2 x + 3 y = 18. x + 7 y = 31.

She plans to solve for x in the first equation as her first step since both 2 and 3 can be divided into 18. Why is Serina mistaken?

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Serina wants to solve the following system of equations in the most efficient way.

2 x +...

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