Answer:
3.8
Step-by-step explanation:

Let's add 5x to both sides of the equation...

Then, let's add 75 to both sides of the equation...

Divide by the coefficient of x, (35)...

The formula for the volume of a cone is:

The formula for the volume of a cylinder is:

The formula for the volume of a triangular prism is:

The formula for the volume of a pyramid is:

The formula for the volume of a rectangular prism is:

Answer:
9a+6b
Step-by-step explanation:
4a+7b+5a-b
First figure out the a's 4a + 5a = 9a
Then do b's (Remember, if there is no number by the letter then it is 1)
7b - 1b = 6b
So for this to be simplified the answer is 9a+6b