What's the strategy for 77÷4 quotient

What should be done to solve the equation? x+14=21 add 14 to both sides of the equation. subtract 14 from the left side of the equation. add 14 to the left side and subtract 14 from the right side of the equation. subtract 14 from both sides of the equation.

Which number produces a rationale number when multiplied by 1/5

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct