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elena-s [515]
2 years ago
9

5/12x-168= ?/12y(x-14)

Mathematics
1 answer:
butalik [34]2 years ago
6 0

Move all terms to the left side and set equal to zero. Then set each factor equal to zero


m=                     5x-2016

                        _______

                         y (x-14)


(I'm trying to draw a fraction lol)


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To find the area of a rectangle, we multiply the Base by the Height.                        In this case the:   Base = AB   and     Height = BC  

So to get the area, we multiply AB by BC.                                               (and we know that <em>BC = 5x+5/x+3</em> <em>and BC = [3x+9/2x-4)</em>  

So we would do:

\frac{5x+5}{x+3} x \frac{3x+9}{2x-4}                              

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For example \frac{2}{8} x \frac{3}{4} = \frac{6}{32}    


Answer: \frac{5x+5}{x+3} x \frac{3x+9}{2x-4} = \frac{(5x+5)(3x+9)}{(x+3)(2x-4)}

\frac{(5x+5)(3x+9)}{(x+3)(2x-4)} = \frac{5(x+1)*3(x+3)}{(x+3)*2(x-2)} [<em>Note: </em><em>we are able to factorise some brackets to make the sum easier. For example we can factor out the 5 in (5x+5) to get: 5(x+1)   ]</em>

Now lets simplify by multiplying the 5 and 3 together in the numerator:

\frac{5(x+1)*3(x+3)}{(x+3)*2(x-2)} = \frac{15 (x+1)(x+3)}{(x+3)*2(x-2)}

If you notice, there is a (x+3) in numerator and the denominator. This means that we can cancel out the (x+3), to get the most simplified expression for the area:

\frac{15 (x+1)(x+3)}{(x+3)*2(x-2)} = \frac{15(x+1)}{2(x-2)}

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