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Anna35 [415]
4 years ago
11

Will give brainliest!

Mathematics
2 answers:
Darina [25.2K]4 years ago
8 0
The bottom left is right hope this helps
OlgaM077 [116]4 years ago
7 0
Since we substitute everything that b is equal to into the first equation (which is what we do) we see that 3a+(a-15)=225.

:)
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