Question 22206
Hello, my name's Hannah and I'm going to help you solve the problem: 9x-4=7x+8.
First of all, you are trying to isolate x, so keep that in mind. In this problem, there are variables on both sides of the equal signs; because of this, you will need to variables so they're both on the same side. In this problem, you will need to subtract 7x from both sides of the equation.

9x-4=7x-8
9x-4-7x=7x-8-7x

Now, you are left with 2x-4=-8. Now, you will have to take out the additional information that you don't need. Such information may be addition and subtraction problems. In this problem, you will need to add 4 to both sides of the equation.

2x-4=-8
2x-4+4=-8+4

Now you have 2x=-4

You are now ready to divide each side by 2 to isolate x.

2x/2=-4/2

And x equals -2. If you need anything else, please inform me; I'll be glad to help. =]