Which of the following ordered pairs represents the solution to the system given below?

2x + y = 20

4x - 2y = 40

first divide equation 2 by 2 just to work with smaller numbers. add the new equation to the first. the y's will cancel out. 4x = 40 so x = 10 from equation 1 2x + y = 20 and x = 10 so replace x with 10 and find y

Multiply the 1st row by 2

4x+2y=40

4x-2y=40

Subtract the 2nd row from the 1st row

4y=0

Solve for y in the above equation

4x+2*0=40

Solve for x in the above equation

x = 10

y = 0