a1 + a3 = ( b2*(b1+b3) ) / (b1 + b2 + b3)(adsbygoogle = window.adsbygoogle || []).push({});

a1 + a2 = ( b3*(b1+b2) ) / (b1 + b2 + b3)

a2 + a3 = ( b1*(b2+b3) ) / (b1 + b2 + b3)

those equations are given

i need to show that

a1 = (b2 * b3) / (b1 + b2 + b3)

i just need some help starting this off i think i need to solve for a1 and then substitute but what ever i do i am always left with a2 or an a3 in my answer any help is appreciated

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# Rearranging eqn

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