x = one number
y = other number.
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x+y=5.3
x-y=1.7
Solve for x and y.
You don't need the other information but it can be used if you wish.
the sum of two decimal numbers is 5.3. their difference is 1.7 and there product is 6.3 what are the two numbers?
3 answers
x+y = 5.3
x-y = 1.7
add them
2x = 7.0
x = 3.5
then y = 1.8
the info that their product is 6.3 was redundant, but checked out.
x-y = 1.7
add them
2x = 7.0
x = 3.5
then y = 1.8
the info that their product is 6.3 was redundant, but checked out.
1.8 and 3.5. I just used guess and check. I knew that the numbers had to be under 5.3. Also, the number in the tenths place had to add up to 13 or 3, so 1.8 and 3.5.