Math

Which algebraic expression is equivalent to the expression below?

10(4x + 3) - 9x

a. 31x + 30
b. 31x - 3
c. 40x + 21
d. 49x + 30

I feel the answer is B. but I'm not sure. If someone could type out the equation, that'd be great

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  1. distributing the 10 ... 40x + 30 - 9x

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