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primary 6 | Maths | Algebra
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Vanessa
Vanessa

primary 6 chevron_right Maths chevron_right Algebra chevron_right Singapore

Please advise

Date Posted: 3 years ago
Views: 290

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Christmas MT
Christmas Mt's answer
3380 answers (A Helpful Person)
Hi Vanessa! Let me help you out!
So first we find how many boys and girls there are.
Boys is z
Girls is 40 (class total) - boys (z) which is 40-z

So now we find how many stamps there are.
Boys stamps = 3 x Z =3z
Girls stamps = (40-z) x 5 = 200-5z
200-5z + 3z = 200-2z