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Alla [95]
3 years ago
9

if 7 is added to twice a number and this sum is multiplied by 2, the result the same as if the number is multiplied by -8 and 2

is added to product, what is the number?
Mathematics
1 answer:
Nady [450]3 years ago
7 0
X - the number

2(2x+7)=-8x+2 \\
4x+14=-8x+2 \\
4x+8x=2-14 \\
12x=-12 \\
x=\frac{-12}{12} \\
x=-1

The number is -1.
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4 0
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is needed for a 15,000 W engine to do 1,800,000 J of work about:
 
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