Solve using the multiplication principle.

10x= -90

The solution is x = -9

please check

The answer looks ok to me but I don't know that you used the multiplication principle.

To solve the equation using the multiplication principle, follow these steps:

1. Start with the given equation: 10x = -90.

2. Divide both sides of the equation by 10 to isolate the variable x: (10x)/10 = (-90)/10.

This simplifies to: x = -9.

So, the solution to the equation 10x = -90 is x = -9.

Upon checking, if we substitute x = -9 back into the original equation, we can verify that it satisfies the equation:

10(-9) = -90.

-90 = -90.

Since both sides of the equation are equal, we can conclude that the solution x = -9 is correct.