Question

From the sum of 12.21 and 1.212 subtract the sum of 11.12 and 1.12 to 1.096 to get 2?

Answer 1

Answer:

Step-by-step explanation:

Hello There:  

Let's start by assigning variable names for these two unknown whole numbers.  

x = the larger number  

y = the smaller number  

The problem tells us that x + y = 123  

It also tells us that x - y = 45  

These two equations make what we call a "system of two linear equations". There are many ways to solve such a system for x and y. I'll use the substitution method.  

Solve one of the equations for y, and then substitute the resulting expression for y into the other equation. This will create an equation that contains only x, for which you can solve.  

x + y = 123  

Subtract x from both sides.  

y = 123 - x  

Substitute 123 - x for y in the other equation.  

x - y = 45