2x + 7 = 15
Subtract 7 from both sides: 2x = 8
Divide both sides by 2: x = 4
Let the number be x and so if 2x -7 = 15 then the value of x is 11
2x + 7
15/7 is a rational number
n+7/6
x/4+7=-31
Let the number be x and so if 2x -7 = 15 then the value of x is 11
Let the number be x Twice a number means 2x 7 less than twice a number means 2x-7
2*(7 + 15) = 2*22 = 44
? + 7 = 15 so 15 - 7 = ?
?=2n+7
2x + 7
15/7 is a rational number
n+7/6
2k - 7
7 less than 4 times a number
If you mean... -7+x*2=23 then x = 15. Done without the aid of a calculator ! The value of 'x' (the unknown number) MUST equal 30, because 30-7=23 - SO, half the unknown number must be 15!
Then the number is 3