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Alenkasestr [34]
3 years ago
13

The sum of twice a number and 18 less than the number is the same as the difference between -30 and the number

Mathematics
2 answers:
maksim [4K]3 years ago
6 0
2x + x - 18 = -30 - x
Monica [59]3 years ago
6 0
Lets say the number is x. The formula would be:
2x + x - 18 = x -30
To find x, you have to get rid of everything els, so minus x from both sides.
2x - 18 = -30
Since -30 is the smallest number, you get rid of that next. Add 30 to both sides
2x + 12 = 0
Now get rid of +12 by doing -12.
2x = -12
divide both sides by 2 to get x by itself
x = -6.

To double check your answer, do the reverse. Substitute -6 iinto the equation wherever it says x.

2x + x - 18 = x -30 becomes (2 x -6) + (-6 - 18) = -6 - 30.
Use BIDMAS (Brackets Indices Division Multiplication Addition Subtraction) to get your answer. Brackets are first
-12 + -24 = -6 - 30
-36 = -6 - 30 which is basically -36 = -36
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Answer:

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Step-by-step explanation:

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x > - 13

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3 0
3 years ago
Thanks who ever helped ​
NeTakaya

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2 years ago
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vitfil [10]
Hey there! :D

So, basically, you could say that "x" is equal to both of the legs. 

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5√2 is the answer. 

I hope this helps!
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3 years ago
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slavikrds [6]

Answer:

Step-by-step explanation:

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6 0
2 years ago
Read 2 more answers
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