A number plus itself, plus twice itself, plus 4 times itself, is equal to -104. What is the number?
x= -13
To solve this equation, let's consider the number as "x".
According to the given information, we can write the equation:
x + x + 2x + 4x = -104
To simplify this equation, we can combine the like terms:
8x = -104
To isolate the variable, we divide both sides of the equation by 8:
(8x)/8 = (-104)/8
x = -13
Therefore, the value of the number is -13.