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