Step 1:
Write the two systems of equations
3x + 6y = 12
2x - y = 5
Step 2:
To write an expression that can be used to substitute y from equation 1 into equation 2, you will make y the subject of the formula from equation 2.
Step 3:
[tex]\begin{gathered} \text{From equation 2} \\ 2x\text{ - y = 5} \\ Make\text{ y the subject of the formula} \\ \text{y = 2x - 5} \end{gathered}[/tex]Final answer
2x - 5