8x = 36 + 18y ⇒ -2(8x = 36 + 18y) ⇒ -16x = -72 - 36y
9x = 28 + 4y ⇒ 9(9x = 28 + 4y) ⇒ 81x = 252 + 36y
65x = 180
[tex]\frac{65x}{65} = \frac{180}{65}[/tex]
x = [tex]\frac{36}{13}[/tex]
9x = 28 + 4y
9[tex](\frac{36}{13})[/tex] = 28 + 4y
9(36) = 13(28 + 4y)
324 = 364 + 52y
-40 = 52y
[tex]\frac{-40}{52} = \frac{52y}{52}[/tex]
[tex]\frac{-10}{13} = y[/tex]
Answer: x = [tex]\frac{36}{13}[/tex], y = [tex]\frac{-10}{13}[/tex]
