7 Robert, Anna and Helen have some marbles. Anna has 5 marbles more than Robert. Helen has 3 marbles fewer than Robert. If Anna has x marbles: a how many marbles does Robert have? b how many marbles does Helen have?
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Step-by-step explanation:
a) Marbles Robert have = x
Marbles Anna have = 5 more than Robert
therefore, Robert have marbles = x+5
b) Marbles Robert have = x+5
Marbles Helen have = 3 marbles less than Robert
therefore,Helen have = x+5-3
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