Answer:

Step-by-step explanation:
First transpose 3x
you are having 3x+4y=7
by transposing you will get
4y=-3x+7
divide by 4 throughout by making y subject of the formula you will find your equation as y=mx+c.
Answer:
Step-by-step explanation:
5(x - 1.5) = 22.5
5x - 7.5 = 22.5
5x = 15
x = 3