76 decreased by twice a number in an algebraic expression

Answer is 76 - 2x

When solving these problems, you have to look at each individual word step by step

76 is being decreased

decreasing means something is being taken away from it, so this must be subtraction

76 -

by twice a number

so something is definitely being multiplied by 2

76-2

Now since we don't know this number that is being multiplied by 2, you would have to put x in it's place.

76-2x