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3 years ago

Please Help...........

Mathematics

1 answer:

klasskru [66]3 years ago

6 0

I believe the answer might be:
x = 28/19

Steps:
Expand
3(5 - x)/2 - 4(3 + 2x)/5

-3x + 15 - 8x + 12
------------ -----------
2 5

Find the LCD for the equation above:
(15-3x) * 5 - (12+8x) * 2
------------- --------------
10 10

Now we combine them since the denominators are equal:
5(-3+15) - 2(8x+12)
--------------------------
10

We expand above:
-31x+51
-----------
10

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Step-by-step explanation:

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For you, total cost = x+4y+2z= 84

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Required system:

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from (i), $x=84-4y-2z$ (*)

put this in (ii) and (iii) we get

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$\mathrm{Subsititute\:}y=-\frac{z-92}{7}\ \text{in}\ (v)$

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