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Artemon [7]
3 years ago
6

Twice the sum of a certain number and 26 is 72

Mathematics
1 answer:
katen-ka-za [31]3 years ago
3 0

Answer:

The unknown number is 12

Step-by-step explanation:

2(x+26)=76

or,x+26=76÷2

or,x=38-26

Therefore,x=12.

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Twice a number decreased by 8 is 2 less than half the number
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2x-8=1/2-2

Step-by-step explanation:

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3/8 + 1/4 < 1

Check: Find common denominators, what you do to the denominator, you do to the numerator. Multiply 2 to both the top and bottom of the fraction:

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Any fraction works in the second one, for regardless, you will get less than a whole number, so solve the third one first.

The 2 fractions needed will have to be greater than 1. 1/4 has already been used, so find two pairs of fractions that will, when added, be greater than 1.

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16/24 - 3/24 < 1

13/24 < 1 (True).

~

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