Question

Solve the system using elimination 20x+3y=20 -20x+5y=60

Answer 1

x=2, y=20

Explanation:

20x+3y=20-20x+5y=60

Combine like terms, so you would do plus 20x both sides and minus 3y both sides.

After that you can also do minus 20 both sides.

So you are left with 40x=2y=40

Answer 2

8y=80
y=10
Substitute this y into one of the equations and solve for x. For example:
20x+30=20
x=-1/2.

(-1/2,10) is the solution.