The solution (x, y) = (2, 13)
Explanation:7x- 3y = -25 ...equation 1
4x + 5 = y ....equation 2
From equation 2, they y has been made the subject of formula
So, we can substitute for y in equaton 1:
7x - 3(4x + 5) = -25
7x - 12x - 15 = -25
-5x - 15 = -25
add 15 to both sides:
-5x - 15 + 15 = -25 + 15
-5x = -10
divide both sides by -5:
-5x/-5 = -10/-5
x = 2
substitute for x in equation 2:
4(2) + 5 = y
8 + 5 = y
y = 13
The solution (x, y) = (2, 13)
