The formula for the area of a triangle is a=1/2bh, where A represents the area, b is the base, and h is the height of the triangle. Solve the equation for b.

A = 1/2bh

We want to solve the equation for b, so we want to get the b term by itself

Divide both sides by 1/2:

A/(1/2) = (1/2*b*h)/(1/2)

This causes the 1/2 to cancel on the right hand side.

And now A/(1/2) = 2A

2A = b*h

Next we need to divide both sides by h:

2A/h = (b*h)/h

This causes the h terms to cancel out on the right hand side leaving us with:

2A/h = b

And we have solved for b!