Formulae / Changing the subject

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Ok, from now on I shall use brackets! That statement you made did make me chuckle though.

You've lost me..

Please please use brackets.

(3w+20)/20 = A/(A+12)

Make.a.common denominator? Or multiply throughout by 20(a+12)

What do you get?

You should have: (after multiplying through)

(3w+20)(A+12) = 20A

Expand. What do you get?

Original post by L'Evil Fish

You should have: (after multiplying through)

(3w+20)(A+12) = 20A

Expand. What do you get?

still unsure..didn't get any of it! been at it for ages!

still unsure..didn't get any of it! been at it for ages!

Do you know how to expand brackets? If so, do that and post what you get.

Do you know how to expand brackets? If so, do that and post what you get.

You just multiply them out? Multiply thr 1st bracket by the 2nd?

You just multiply them out? Multiply thr 1st bracket by the 2nd?

Yes?

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