Question

The sum of twice a number and 15 is 9

Answer 1

`\huge \purple{\tt{Answer:}}`

Let the unknown number be x .

`\Large{\underline{\sf{According~to~question}}}`

`\sf {2x+15=9} \\\\\ \implies \sf{2x=9-15} \\\\\ \implies \sf {2x=-6}`

`\implies {\sf {x ={ ( - 6)/(2)}}} \\\\\ \implies \sf{x=-3}`

Answer 2

Key word: sum


twice a number = 2n

Sum of that and 15 = 2n + 15


is = equals


Answer: 2n + 15 = 9