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Svet_ta [14]
2 years ago
11

10

Mathematics
1 answer:
mihalych1998 [28]2 years ago
7 0

Step-by-step explanation:

If a+b=50

When b=30

a=50-b

a= 50 - 30

a=20

Therefore 20(a)+30(b)=50

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<u>Answer:</u>

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