Answer :

x = 10

Divide both sides by the numeric factor on the left side, then solve.

Answer:

x = 6

Step-by-step explanation:

3(x-4) = 18

you need to distribute the 3 into both x and -4 which makes the equation

3x-12=18

this happens because 3 multiplied by x is 3x and 3 multiplied by -4 is 12

now that we have our new equation we have to isolate the x. To do this we need to add 12 to both sides

3x - 12 = 18  

    +12   +12

3x = 30

now we have to divide out 3 to isolate the x

3x = 18

3       3          

x = 6