Question

Solve the system of equations.

\begin{aligned} & -4x+11y = 15 \\\\ & x=2y \end{aligned}
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−4x+11y=15
x=2y
​

Answer 1

x = 10

Explanation:

y = 5

Answer 2

x=10

y=5

Explanation:

Plugin 2y for x in the first equation.

you will get -4(2y)+11y=15

then you have -8y+11y=15

3y=15

y=5

x=2y, so x=10