
Mitiku D. answered 02/23/15
Tutor
4.9
(205)
Electrical Engineer, Patient and Objective
Victoria, A=1/2h(b+B)
Multiply both sides by 2. 2A=1/2h(b+B)2. This cancels the 1/2 on the left side.
Divide both sides by h. 2A/h=h/h(b+B). This moves h over to the left.
2A/h=b+B. Subtract b from both sides 2A/h - b = b + B - b
B = 2A/h - b