Question

Solve the simultanious equasion
8x+3y=45
2x+3y=27
pls pls pls help​

Answer 1

`x=3,\:y=7`

Explanation:

`\begin{bmatrix}8x+3y=45\\ 2x+3y=27\end{bmatrix}`

`\mathrm{Substitute\:}x=(45-3y)/(8)`

`\begin{bmatrix}2\cdot (45-3y)/(8)+3y=27\end{bmatrix}`

`\begin{bmatrix}(45+9y)/(4)=27\end{bmatrix}`

`y=7`

`\mathrm{For\:}x=(45-3y)/(8)`

`\mathrm{Substitute\:}y=7`

`x=(45-3\cdot \:7)/(8)`

`x=3`

`\mathrm{The\:solutions\:are}:`

`x=3,\:y=7`