solve for x

1. -5y+7=-18

2.-12=3a-5a

3. 2.5p=0.5p+14

4. 3x-7-+(-5x+8)

2.5p=.5p+4

divide both sides by .5 p.

You will be left with 5p=4

Divide 4 by 5

so the answer is p=4/5

No what you should do is all adding/subtracting first then dividing/ multiplying.

Sure! I can help you solve these equations. Let's go through each one step by step and explain how to find the value of x.

1. -5y + 7 = -18

To solve for x in this equation, we need to isolate the variable y. We can do this by subtracting 7 from both sides of the equation:
-5y + 7 - 7 = -18 - 7
-5y = -25

Now, to solve for y, we divide both sides of the equation by -5:
(-5y) / -5 = (-25) / -5
y = 5

So the solution to this equation is y = 5.

2. -12 = 3a - 5a

In this equation, we have two terms with the variable 'a'. To solve for a, we need to combine like terms on the right side of the equation:
-12 = 3a - 5a
-12 = -2a

Next, to solve for a, we divide both sides of the equation by -2:
(-12) / -2 = (-2a) / -2
6 = a

Therefore, the value of a in this equation is a = 6.

3. 2.5p = 0.5p + 14

To solve for p in this equation, we need to isolate the variable p. We can start by subtracting 0.5p from both sides of the equation:
2.5p - 0.5p = 0.5p - 0.5p + 14
2p = 14

Next, to solve for p, we divide both sides of the equation by 2:
(2p) / 2 = 14 / 2
p = 7

So the solution to this equation is p = 7.

4. 3x - 7 + (-5x + 8)

In this equation, we have two groups of terms: 3x - 7 and -5x + 8. To simplify this expression, we can combine the like terms:
3x - 7 - 5x + 8

Now, we can simplify it further by combining the x terms:
(3x - 5x) - 7 + 8
-2x + 1

So the simplified expression is -2x + 1, and this cannot be solved for a specific value of x unless there is an equation or inequality given. If there was an equation or inequality provided, we could solve it further using the rules of algebra.