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3(a+4)=ac+5f. Rearrange to make a the subject.

3(a+4)=ac+5f

3a+12=ac+5f

3a-ac=5f-12

a(3-c)=5f-12

a= (5f-12)/(3-c)

RR

Answered by Rumana R. • Maths tutor

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