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posledela
3 years ago
5

Solve -18+x=-3A. -15B. 15C. 21D. -21I need the answer​

Mathematics
2 answers:
Furkat [3]3 years ago
8 0
B. 15 because
-18+x=-3
X= -3 + 18
X = 15
Rudik [331]3 years ago
6 0

Answer: x=15

Move all terms containing x to the left, all other terms to the right

<u>Add 18 to each side of the equation</u>

<u></u>-18 + 18 + x = -3 + 18<u></u>

<u></u>

<u>Combine like terms: -18 + 18 = 0 </u>

<u></u>0 + x = -3 + 18\\x = -3 + 18<u></u>

<u></u>

<u>Combine like terms: -3 + 18 = 15 </u>

<u></u>x=15<u></u>

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This is easy to get. We know the sequence cause it follows a pattern of 8, so let's try some values of n from 1 to 4, to get those numbers with the first formula:

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The first formula could be right only beggining with n = 0. Here is the proof:

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