Given:
5x - y = 3(x + y)
To express x in terms of y means to make x the subject of the equation.
Let's take the following steps.
Step 1:
Expand the parenthesis
5x - y = 3x + 3y
Step 2:
Subtract 3x from both sides
5x - 3x - y = 3x - 3x + 3y
2x - y = 3y
Step 3:
Add y to both sides
2x - y + y = 3y + y
2x = 4y
Step 4:
Divide both sides by 2:
[tex]\begin{gathered} \frac{2x}{2}=\frac{4y}{2} \\ \\ x=2y \end{gathered}[/tex]Let's find the value of x when y = 5.
Substitute y for 5 in (x = 2y).
We have:
x = 2(5)
x = 10
ANSWER:
x = 2y
x = 10
