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Work out the value of 3c - 4d when c = 5 and d = 1 over 2 ( 1 and a half )

Please help me out with this one , thanks! From my maths homework , could you please show working out as well please?

User Oz
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1 Answer

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3(5)-4( (1)/(2))

=
15-2

Answer:
13

I hope I helped :)
User Ron Smith
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