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Anuta_ua [19.1K]
3 years ago
12

Find 3 consecutive even numbers where the product of the smaller two numbers is 40 less than the square of the largest number.

Mathematics
1 answer:
Marina86 [1]3 years ago
5 0
3\ consecutive\ even\ numbers:\ 2x,2x+2,2x+4\\\\2x(2x+2)+40=(2x+4)^2\\\\
4x^2+4x+40=4x^2+16x+16\\\\
4x^2-4x^2+4x-16x=16-40\\\\-12x=-24\ \ |:(-12)\\\\x=\frac{24}{12}=2\\\\2x=2=4\\\\2x+2=6\\\\2x+4=8\\\\Numbers\ are\ 4,6,8.
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7x + 6(-3 + 4x) = 199<br>what does x equal?
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Simplify. Note the equal sign. What you do to one side, you do to the other. Follow PEMDAS.

Isolate the x.

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6(-3) = -18

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