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mestny [16]
4 years ago
8

What is 42 decreased by twice some number

Mathematics
1 answer:
valkas [14]4 years ago
4 0
Well 21 + 21 = 42 , but I don't know if I understand your question correctly.
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First, simplify the expression 2r^2 + 3s^3 - r^2 + 4t^2 - r^2. Here you have three terms with r^2, group them in the following way:

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