Answer:
x = [tex]\frac{s-y}{3-r}[/tex]
Step-by-step explanation:
3x + y = xr + s
Subtract y from both sides:
3x + y = xr + s
3x + y - y = xr + s - y
3x = xr + s - y
Next, subtract xr from both sides:
3x - xr = xr + s - y - xr
3x - xr = s - y
Then, factor out x from the left-hand side:
x( 3 - r ) = s - y
Finally, divide both sides by (3 - r) to solve for x:
x( 3 - r ) = s - y
[tex]\frac{x (3 - r)}{3 - r} = \frac{s - y}{3 - r}[/tex]
x = [tex]\frac{s-y}{3-r}[/tex]
