The difference between two multiples of ten is 330. The total of them is 710. What are the two numbers?
is there a way to do this calculation without using simultaneous equations?
is there a way to do this calculation without using simultaneous equations?
2 Answers
See a solution process below:
Explanation:
We can first name our variables. Because they are multiples of
From the information in the problem we can write two equations:
Equation 1:
Equation 1:
Step 1: Solve the first equation for
Step 2: Substitute
Step 3: Substitute
Solution:
If
If
The numbers are: 520 and 190
the first number is
Explanation:
Let the numbers be
Then the difference is:
and their sum is:
If we sum the equations side by side, we'll get:
that's
and
We can find y by subtracting the equations side by side:
that's
then the first number is
and the second one is