I don't know what you mean by equation 1. I assume you mean x + y = 7 is equation 1.
If so, solve for y as step 1.
x + y = 7
y = - x + 7
The y-intercept is 7.
Your directions do not say to solve the system of equations.
If you need to solve by graphing, use DESMOS or your graphing calculator. The solution of the system of equations is the point on the graph where the two equations meet or touch each other.

-

=

-

First, simplify

to

/ Your problem should look like:

-

=

-
Second, simplify

to

/ Your problem should look like:

-

=

-
Third, multiply both sides by 12, which is the LCM of 6 and 4. / Your problem should look like: 10h - 7 = -9h - 26
Fourth, add 9h to both sides. / Your problem should look like: 10h - 7 + 9h = -26
Fifth, simplify 10h - 7 + 9h to 19h - 7 / Your problem should look like: 19h - 7 = -26
Sixth, add 7 to both sides. / Your problem should look like: 19h = -26 + 7
Seventh, simplify -26 + 7 to -19. / Your problem should look like: 19h = -19
Eighth, divide both sides by 19. / Your problem should look like: h =
Ninth, cancel out 19. / Your problem should look like: h = -1
Answer:
h = -1
So, I understand that you one 1/10th, that is one tenth or

so:

*800=

=80
The answer is 80.
I calculated this by dividing both the nominator and the denominator by the same number - this is always allowed. This number is 10.