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serg [7]
2 years ago
8

The sum of a number and 5 decreased by twice the number.

Mathematics
2 answers:
GREYUIT [131]2 years ago
8 0
<h3>Answer:  -x+5</h3>

This is the same as 5-x

Work Shown:

x = unknown number

x+5 = sum of the number and five

x+5-2x = that previous sum decreased by twice the unknown number

-x+5 = combine like terms

Ann [662]2 years ago
5 0

Answer:

-x+5

hope this help!!!

Step-by-step explanation:

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3 years ago
Two mechanics worked on a car. the first mechanic worked for 5 hours, and the second mechanic worked for 15 hours. together they
Ksenya-84 [330]

Alright, lets get started.

Suppose first mechanic charges= x

So, second mechanic charges will be = (125 - x) (because total of their rates was 125)

first mechanic worked for 5 hours, and the second mechanic worked for 15 hours and together they charged a total of $1225

Means

5 x + 15 (125-x) = 1225

5 x + 1875 - 15 x  = 1225

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