Firstly, multiply both sides by 2: [tex] 2A=h(b_1+b_2) [/tex]
Next, divide both sides by h: [tex] \frac{2A}{h}=b_1+b_2 [/tex]
Next, subtract both sides by b1, and your answer will be [tex] \frac{2A}{h}-b_1=b_2 [/tex]
