55+7*79+9=100 plz solve diffrrent types

Do you mean by telling whether the equation is true or false?

Then, 55+7×79+9=100 is FALSE.

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.