Answer: -17
Explanation:
Let's make this into a equation:
-7x-(-15)=134, where x represents this unknown number
next let's simplify and get rid of those double negative signs in -(-15) since a negative times a negative is a positive.
-7x+15=134
to solve for x we need to isolate the variable (-7x) so we subtract from both sides
-7x + 15 - 15 = 134 - 15
-7x = 119
finally, we also divide both sides of the equation
(-7x)/-7 = 119/-7
x = -17.
So, the solution to the equation is x = -17.