Three fourths of a number decreased by nine is at least forty two

If you mean to write it as an inequality, then: 3/4x - 9 ≥ 42
3/4 of a number refers to three quarters of some variable, represented by "x". Decreased by nine indicates you're subtracting the term by 9. "At least" means greater than or equal to - you don't want it "at most"; that limits it to 42 and below. "At least" also indicates that you want to include the value 42 since 42 is at least 42.

Assuming it's an inequality, it should be: (3x/4) - 9 > 42. You'll need to have the line underneath the '>' sign.

Hopefully this has helped! :)

The answer is 49/16 or 3 1/16