5/x+1/3=6/x what is the number i multiply both sides by?

First multiply both sides by x to eliminate the x on the right.

5+(1/3)x=1

Multiply by 3 to get x by itself

x=3

Edit for check:

Substitute 3 for x.

5/3+1/3=6/3

6/3=6/3

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.