Question

If x = 30, what does 55 + x - 27 equal?

Answer 1

58

Explanation:

Put 30 where x is in the expression and do the arithmetic.

55 + 30 - 27 = 85 - 27 = 58

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It can be advantageous to use the associative property of addition to evaluate the expression as ...

55 + (30 -27) = 55 +3 = 58