One number is four less than a second number. Twice the first is 15 more than 3 times the second. How do you find the numbers?
The two numbers are
We need to first write this problem in terms of equation and then solve the simultaneous equations.
Let's call the numbers we are looking for
We can write the first sentence as an equation like:
And the second sentence can be written as:
Now we can substitute
We can now substitute