Ineed solve each system by substitution 4x+2y=7; y=5x

To solve the system if equations substitute the given values and simplify:

4x+2y=7
y=5x

To start off we are given what h equals already so we do not have to solve for it. This means we can just plug in its values into the first equation.

4x+2(5x)=7
Solve for x
4x+10x=7
14x=7
x=7/14
x=1/2

Now that we have an x value substitute back into the second equation to find the y value and be able to create a coordinate point.

y=5x
y=5(1/2)
y=5/2
y=2.5

So your answer would be
(1/2,5/2) or (0.5,2.5)

I hope this helps!