−(10x+10)=7+3(−10x−8)

Sure, let's solve the equation step by step:

1. Distribute the negative sign on the left side of the equation: -10x - 10 = 7 + 3(-10x - 8)
2. Distribute the 3 on the right side of the equation: -10x - 10 = 7 - 30x - 24
3. Simplify the right side of the equation: -10x - 10 = -30x - 17
4. Add 30x to both sides of the equation to get the x terms on one side: 20x - 10 = -17
5. Add 10 to both sides of the equation to isolate the x term: 20x = -7
6. Divide both sides of the equation by 20 to solve for x: x = -7/20

So, the solution to the equation -10x - 10 = 7 + 3(-10x - 8) is x = -7/20.