Answer:
A. (3, -5)
Step-by-step explanation:
Use the first equation to find an expression for x. (Add 3y.)
x = 18 + 3y
Now, use this where x is in the second equation.
2(18 +3y) +19 = -5y
55 +6y = -5y . . . . . . . eliminate parentheses
55 +11y = 0 . . . . . . . . .add 5y
5 +y = 0 . . . . . . . . . . .divide by the coefficient of y
y = -5 . . . . . . . . . . . . . add -5; corresponds to answer choice A
Using the expression for x, we can find its value:
x = 18 +3(-5) = 3
The solution is (x, y) = (3, -5). . . . . . matches choice A
