4/13=-2b/13=6b/26

There is something wrong with that. Did you mean to type two = signs?

the second one is an addition sign

Hint: clear the fractions.

4/13 = -2b/13 + 6b/26
4 = -2b + 3b (multiplying both sides by 13)
b = 4

To solve this equation, we need to isolate the variable "b" on one side of the equation.

Let's start by simplifying the first fraction:
4/13 = -2b/13

Since both fractions have a denominator of 13, we can remove it to simplify the equation:
4 = -2b

Now, let's simplify the second fraction:
-2b/13 = 6b/26

Since the denominator of the second fraction is 26, we can rewrite it as:
-2b/13 = 6b/2*13

Simplifying further:
-2b/13 = 3b/13

Now that both fractions have the same denominator, we can eliminate it:
-2b = 3b

To isolate the variable "b," we need to get all terms with "b" on one side of the equation and other terms on the other side.

Let's subtract 3b from both sides:
-2b - 3b = 3b - 3b

Simplifying:
-5b = 0

Lastly, we divide both sides of the equation by -5 to solve for "b":
b = 0

Thus, the solution to the equation is b = 0.