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jeanieb
13.10.2019 •
Mathematics
You and friend purchase an equal number of magazines. your magazine costs 1.50 eachand your friends costs 2.00 each total cost for both is 10.50. solve equation
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Ответ:
we start with $2n and $1.50n
then we add $2 and $1.50 = $3.50n
with that we put $3.50 into an equation $3.50n = $10.50
so now lets get rid of those decimals by taking 3.5 and doubling it to become 7 after that we need to double 10.5 to 21
so our new equation is 7n = 21
lets get n be itself by dividing 7 from both sides so that on the side with 7n the 7 cancels out
Finally n=21/7 which equals 3
so they both both 3 magazines each so if your looking for the total number of magazines between then they got 6 magazines
Ответ:
They both bought 3 magazines each. The total number of magazines bought are 6 magazines.
Ответ:
1x + 4x = 5X
-6y + 7y = Y (1y)