Answer:
y = 3
x = 4
Explanation:
20x-10y=50
10x-15y=-5
I will use the elimination method for solving systems of equations.
I want to eliminate x, so I will multiply the bottom equation by negative 2.
20x-10y=50
-2(10x-15y=-5)
thus, I get
20x-10y=50
-20x+30y=10
I can now add these equations and get rid of x.
20y = 60
y = 3
Now, plug in the y value to find x.
20x - (10*3) = 50
20x - 30 = 50
20x = 80
x = 4
Check your answer by plugging in the x and y values to see if the equation is correct!
(20*4) - (10*3) = 50
80 - 30 = 50
The solution works for the first equation
(10 *4) - (15 * 3) = -5
40 - 45 = -5
The solution also works for the second equation.
This solution is correct