The sum of two numbers is 170, and their difference is 110. which is the greater of the two numbers?

Hello!

You can make two expressions based on what you know

x + y = 170
x - y = 110

You can add these expressions to eliminate y

2x = 280

Divide both sides by 2

x = 140

You can now put x into one of the original expression

140 + y = 170

Subtract 140 from both sides

y = 30

So the greater number is 140

Hope this helps!