We are given this equation :
[tex] 3x + 5y =15 [/tex]
We have to solve it for y, so we need to isolate y on the left side,
first we have 3x on the left side in addition, so when we take it to the right side we apply opposite operation that is subtract 3x
[tex] 5y =15-3x [/tex]
Next y is in multiplication with 5, so we apply opposite operation of multiplication that is division, so dividing right side by 5
[tex] y=\frac{15-3x}{5} [/tex]
