Solve the indicated variable In each formula A=1/2 (a+b) h for h

given that

A = 1/2 (a+b) h

the L. C. M for this equation is 2

multiplying through with the L. C. M

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

2A = (a + b) h

dividing through by (a+b)

thus

2A / (a + b) = (a + b) h / (a + b)

when you cancel out the a + b

you will get

h = 2A / (a+b). as your final expression.