1. -21=p-13
2. -8=14-p
3. -6-v-3 1/2
4. -7=-x
5. 10=n/5
6. n/12=-12
7. 3n=-27
What's the question?
I need help solving them.
Posting a bunch of similar questions, and expecting somebody to do your homework for you, usually does not result in success.
I will show you how to do the first, you do the rest the same way.
-21=p-13
-21 + 13 = p - 13 + 13
-8 = p
p = -8
ok. thank you.
Here is how you do the first one. Just remember, you can do almost anything to an equation but do it to both sides.
-21=p-13
You want the unknown on one side and everything else on the other. So we need to move the 13.
Add 13 to both sides.
-21+13 = p-13+13
combine terms
-8=p
The others are done essentially the same way.
For the last one,
3n=-27
Divide both sides by 3
3n/3 = -27/3
n=-9
Someone will be happy to check your work on the others.
To solve these equations, we will go through each one step by step.
1. -21 = p - 13
To isolate p, we need to get rid of the -13. We can do this by adding 13 to both sides of the equation:
-21 + 13 = p
-8 = p
2. -8 = 14 - p
To isolate p, we need to get rid of the 14. We can do this by subtracting 14 from both sides of the equation:
-8 - 14 = -p
-22 = -p
To solve for p, we can multiply both sides of the equation by -1 to give p a positive value:
22 = p
3. -6 - v = -3 1/2
To combine these mixed numbers, we first convert the 1/2 to a fraction. 1/2 is equivalent to 2/4, so the equation becomes:
-6 - v = -3 2/4
Next, we need to find a common denominator so we can add the fractions:
-6 - v = -3 4/4
Since 4/4 is equal to 1, the equation simplifies to:
-6 - v = -2
To isolate v, we can add 6 to both sides of the equation:
-6 + 6 - v = -2 + 6
0 - v = 4
To solve for v, we multiply both sides of the equation by -1 to give v a positive value:
v = -4
4. -7 = -x
To solve for -x, we can multiply both sides of the equation by -1 to give x a positive value:
7 = x
5. 10 = n / 5
To isolate n, we can multiply both sides of the equation by 5:
10 * 5 = n
50 = n
6. n/12 = -12
To solve for n, we can multiply both sides of the equation by 12:
n = -12 * 12
n = -144
7. 3n = -27
To solve for n, we can divide both sides of the equation by 3:
3n / 3 = -27 / 3
n = -9