Question

2 numbers have a difftence of 0.7 and a sum of 1. what are the numbers?

Answer 1

x = 0.85; y = 0.15

Explanation:

Let the larger number = x

Let the smaller number = y

Equations

x + y = 1

x - y = 0.7

Solution

Find x

Add the equations together.

x + x = 1 + 0.7 Combine like terms.

2x = 1.7 Divide both sides by 2

2x/2 = 1.7/2

x = 0.85

Find y

x + y = 1 Substitute for x

0.85 + y = 1 Subtract 0.85 from both sides

0.85 - 0.85 + y = 1 - 0.85

y = 0.15