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3 years ago

12-x=15 What does x equal?

Mathematics

2 answers:

babymother [125]3 years ago

3 0

$12-x=15 \\ \\ -x = 15 - 12 \\ \\ -x = 3 \\ \\ x = -3 \\ \\$

The final result is: x = -3.

solong [7]3 years ago

3 0

Ok. First you isolate the variable. So Ill take 12 which is posotive, and subtract 12 from the 15 and the 12. Now all were left with is -x=3. We multiply each side by -1 to give us x=-3. Hope this helps!

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3 years ago

Solve for x. 25 - 3x = -5(1 - x) - 2x

grandymaker [24]

Answer:

$x = 5$

Step-by-step explanation:

25 - 3x = -5(1 - x) - 2x

We have to first get rid of the parenthesis:

$-5 * 1$ ==> -5

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So now you should have:

25 - 3x = -5 + 5x - 2x

Combine like terms:

25 - 3x = -5 + 5x - 2x

25 - 3x = -5 + 3x

Add 3x to both sides:

25 - 3x = -5 + 3x

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And you should have:

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Add 5 to both sides:

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$\frac{30}{6}$ = $\frac{6x}{6}$

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3 years ago

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3 years ago

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