To solve for x means to find the value of an unknown number.
For instance, in the equation x+14=23, the value of x is 9 because 9 is the number that needs to be added to 14 in order to reach the number 23.
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Do you mean 3x = 45 then if so divided both sides by 3 to find the value of x which is 15
An equation to find the value of the variable 104, 137, 154 and x with a mean of 130 is: (104 + 137 + 154 + x)/4 = 130 395 + x = 130 * 4 x = 145.
5.
X is 6
It equals -36. To solve replace x with -6, because it is the value given in the problem and then just multiply. 6(-6)= -36.