set up a proportion. cross multiply. solve
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1) Write down the equation for the theorem. 2) Replace the sides you know. 3) Solve the resulting equation for the third side.
You use the law of Pythagoras: a2 + b2 = c2, where a and be are the sides adjacent to the right angle, and c is the side opposite. Replace the two sides that you know, and solve for the third one. Pythagoras: hypotenuse squared = sum of squares of other two sides. If you know two of the sides you can calculate the third as above.
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5x = 25Divide both sides by 5:x = 5
20. Because 3x2= 6 and 6+14= 20. duh!!! I know I am a genius!!! --Alternate solution (if the other answer did not answer the right question)-- I think the question can be represented by the equation 14 + 3n = 2, where n= some number that you are trying to solve for. To solve this problem is simple algebraic manipulation. Subtract 14 from both sides to get 3n= -12. Then, divide both sides by 3. The answer is n= -4. So, the missing number was -4.