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1212What is the x value of the solution to the system

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Question:

A
−1

explanation

To solve the system by eliminating y, multiply the first equation, \(2x – y = –5\), by 4 to obtain \(8x – 4y = –20\). Next, add the second equation, \(x + 4y = 11\), to the transformed equation and then solve the resulting equation for \(x\).

\(8x − 4y = −20\)

\(x + 4y = 11\)

\(9x + 0 = −9\)

\(9x = −9\)

\(\frac{\mathrm{9x} }{\mathrm{9}} =\frac{\mathrm{-9} }{\mathrm{9} }\)

\(x = -1\)

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