4 years ago

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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