3 years ago

Mina has 5 more marbels than Kirsty

1 answer:

6 0

Equations: m = k + 5 k = s + 2 m + k + s = 30 ----------------------- Substitute for "m" and for "s":: k+5 + k + k-2 = 30 3k +3 = 30 3k = 27 Kirsty has 9 marbles --- Mina has 9+5 = 14 marbles Seb has 9-2 = 7 marbles

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