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CHALLENGE Sara had some marbles. She got 20 more marbles for her
birthday, and she got 30 marbles at the store. Now Sara has 100 martha
marbles did she have to start?


Sagot :

Answer:

50

Step-by-step explanation:

a + 30 + 20=100

100-30=70

70-20=50

Answer: 50 marbles

Step-by-step explanation: 100-(30+20)=50