Respuesta :
Answer:
10
Step-by-step explanation:
10+20=30
2(5+__) has to equal 30
2*5 is 10 so the missing number has to be 20 when multiplied by 2
__=10
hope this was helpful
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Answer:
10
Step-by-step explanation:
10 + 20=30
30 divided by 2 = 15
15-5= 10 so 10 is your answer
