Answer:
Solution

Explanation:
If the objective is to solve for the system of equations
- 7x - 5y = 36 [1]
x = 2y + 3 [2]
Then the process is as follows
- Substitute x = 2y + 3 from eq [2] in eq [1] : -7 x- 5y = 36
==> - 7(2y + 3) - 5y = 36
- Expand the brackets
-7 ( 2y + 3) = -7 (2y) - 7(3) = - 14y - 21
- Simplify
==> -14y - 21 - 5y = 36
==> -19y - 21 = 36
- Add 21 both sides:
-19y -21 + 21 = 36 + 21
-19y = 57
- Divide both sides by - 19
- 91y/-19 = 57/-19
y = - 3
- Substitute y = -3 in x = 2y + 3:
x = 2(-3) + 3 = -6 + 3 = -3
x = -3