Ineed for trigonometry finding ratios

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.

Nine more than four times a number is the same as one less than twice the number. find the number?

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers