Question

Find the value of x in 3x + 4y = 12 and 9x - 4y = 24.-330.75-0.75

Answer 1

The system of equations is given to be:

`\begin{gathered} 3x+4y=12 \\ 9x-4y=24 \end{gathered}`

To eliminate y, we can add the two equations together:

`3x+4y+9x-4y=12+24`

Collecting like terms and solving, we have:

`\begin{gathered} 12x=36 \\ x=(36)/(12) \\ x=3 \end{gathered}`

The value of x is 3.