The symbols used are called variables.
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Let x represent the unknown number and use the known numbers to solve. Set up the equation: x + 9 = 15 (subtract 9 from each side to solve for the unknown number) x = 6
If something is unknown it is not known by someone or something.
This problem can be solved by substituting (x) for the unknown number and (x + 28) as the number that is 28 more than the unknown number. Set up and solve the problem: x + (x + 28) = 156 (then simplify): 2x + 28 = 156 (subtract 28 from both sides of the equation to isolate the known numbers from the unknown): 2x = 128 (divide both sides by 2 to find the value of x) x (the unkown number) = 64 (now use the value of x to prove the answer) 64 + (64 + 28) = 64 + 92 = 156
Gold is a metallic chemical element, atomic number 79, symbol Au, known in Latin as aurum, Spanish as oro. Commonly used in making rings and necklaces.
The quotient of 14 and a number can be represented as 14 ÷ x, where x is the unknown number. This expression simplifies to 14/x. The quotient is not a fixed value unless the specific value of x is known.