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FunMath  Dec 9, 2017
 #1
avatar+87602 
+1

A  = bh/2      multiply both sides by 2

 

2A  = bh    divide both sides by b

 

2A / b  =  h

 

 

A  =  (h/2) ( b1 + b2)     multiply both sides by 2/h

 

2A / h   =   b1  +  b2     subtract b2 from each side

 

2A /h  -  b2  = b1

 

 

cool cool cool

CPhill  Dec 9, 2017

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