Rearrange aq - ac = d

Start by factoring out the common term, so in this case a.

a(q - c) = d

Now divide by a on both sides to isolate the (q - c)

(q - c) = d/a

Now add c on both sides to make q the subject

q = c + d/a 

Answered by Avnish S. Maths tutor

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