`x + 2x + 12x = 81`
Combine like terms.
`15x = 81`
Divide both sides by 15.
`(15x)/15 = 81/15`
` ` `x = 81/15`
Reduce your answer by factor of 3.
`x = 27/5` or `x = 5.4` `lArr` The solution
Isolate the variable
Since all the variables are on one side simply add them up
Divide by 15
x + 2x + 12x = 81
First combine the like terms ( 2x and 12x and x )
By combining the like terms , your equation should look like
15x = 81 now divide both sides by 15 to get " x " alone
By dividing both sides by 15 , your equation should be
x = 81/15 simplify it to
x = 27/5 which is your answer
First of all you have to combine like terms
Divide by 15 to isolate x.
15x=81/15 = x=5.4