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3241004551 [841]

3 years ago

8

You are shopping for T-shirts. Clothing Warehouse sells 3 T-shirts for $52. The Scene sells 2 T-shirts for $83. New Threads sell

s 4 T-shirts for $127. Which store has the best deal?

1 answer:

Pepsi [2]3 years ago

5 0

The 3 for $52 each shirt is 17.33

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zvonat [6]

So we have the following system of equations:

$\begin{gathered} 4x+3y=5 \\ x=4y+6 \end{gathered}$

We need to solve it by substitution. This means that we have to take the expression for x given by the second equation and replace x with it in the first equation:

$\begin{gathered} 4x+3y=5 \\ 4\cdot(4y+6)+3y=5 \\ 16y+24+3y=5 \\ 16y+3y=5-24 \\ 19y=-19 \\ y=-\frac{19}{19}=-1 \end{gathered}$

So y=-1. If we use this value in the second equation:

$\begin{gathered} x=4y+6 \\ x=4\cdot(-1)+6 \\ x=-4+6 \\ x=2 \end{gathered}$

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jonny [76]

Step 1. 100-15=85
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