cutebab6723
05.03.2021 •
Mathematics
You buy 3 shirts and 1 pair of pants for $32. Your friend buys 2 shirts and 3 pairs of pants for $40.
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Ответ:
You buy 3 shirts and 1 pair of pants for $32. Your friend buys 2 shirts and 3 pairs of pants for $40. How much did each item cost?
First let’s define a shirt as X and pants as Y!
In the first scenario, the equation will be 3X + Y =$32
In the second scenario, the equation will be 2X + 3Y = $40
Now because we have two different variables (X & Y) let’s solve for one of them (Ex: Y) to simplify the equations!
3X + Y= $32—> subtract 3X on both sides of the equation
-3X. - 3X
Net result: Y= 32- 3X
Now we can insert this into the second equation 2X + 3Y = $40 in order to solve for X variable
2X + 3(32-3X) = $40
2X + 96 - 9X = $40 —> simplify the equation
-7X + 96 = $40 —> substrate 96 from both sides
-7X = -56 —> divide both sides by -7
X= 8
Now reinsert 8= X into 3X + Y = $32
3(8) + Y = $32
24+ Y = $32 —> substract 24 from both sides
y = 8
ANSWER: X= 8, Y= 8
If I am wrong I am sorry >_<
Ответ:
The shirts cost $8 each and the pants cost $8 each.
Step-by-step explanation:
Let’s represent them by equations:
For you: 3x+y=32
For your friend: 2x+3y=40
Let’s simplify your equation:
y=32-3x
Now we can put it into the second equation, since we now know what y equals.
2x+3(32-3x)=40
2x+96-9x=40
Subtract 96 from both sides
2x+-9x=-56
-7x=-56
Divide by -7 on both sides
x=8
So x is 8.
Now we know what x equals, so we can substitute the 8 into the 1st equation:
3(8)+y=32
24+y=32
Subtract 24 from both sides
y=8
The shirts cost $8 each and the pants cost $8 each.
Ответ:
2 5/15-1 6/15=9/15
double that 18/15=1 1/5 cup