solve for b2.

A=1/2*h*(b1+b2)

That is just the formula for area of a trapezoid. What is the problem?

solve for b2. so move it around until it is b2=...

Oh

2 A = h b1 + h b2
h b2 = 2 A -h b1
b2 = (2 A - h b1)/h

To solve for b2 in the equation A = 1/2 * h * (b1 + b2), we need to isolate the variable b2 on one side of the equation.

Here's the step-by-step explanation on how to solve for b2:

Step 1: Distribute the 1/2 * h to the terms (b1 + b2).
A = 1/2 * h * b1 + 1/2 * h * b2

Step 2: Subtract 1/2 * h * b1 from both sides of the equation to isolate the term (1/2 * h * b2).
A - 1/2 * h * b1 = 1/2 * h * b2

Step 3: Simplify the equation further.
1/2 * h * b2 = A - 1/2 * h * b1

Step 4: Divide both sides of the equation by 1/2 * h to solve for b2.
(1/2 * h * b2) / (1/2 * h) = (A - 1/2 * h * b1) / (1/2 * h)

Step 5: Simplify the equation further.
b2 = (A - 1/2 * h * b1) / (1/2 * h)

Now, you have solved for b2 in terms of A, h, and b1.