what is the sum of 19 and the differencof1

Answer 1

x + y = 19

x - y = 1

using the process of elimination we are going to cancel out the y since it’s a positive y and a negative y and I’m going to add the two equations together.

2x = 20 divide both sides by 2

x = 10

substitute x = 10 into either equation to find y.

10 - y = 1

-10 -10

_________

-y = -9

y = 9

so it’s 10 and 9.