How do you solve 7u-5u=4?

u = 2

Step-by-step explanation:

7u - 5u = 4

When you have two terms with the same variable, you can subtract their coefficients.

7u - 5u = 4

This is because 7u = u + u + u + u + u + u + u and 5u = u + u + u + u + u.

So if you did this:

(u + u + u + u + u + u + u) - (u + u + u + u + u) = u + u

You would still get the same answer; the other one is just a less repetitive way to express it.

7u - 5u = 4

2u = 4

Now you divide both sides by 2.

(2u) / 2 = 4/2

u = 2

And end up with u = 2!

Answer:u=2

Step-by-step explanation:

7u-5u=4

2u=4

u=2