Question

3x+6=21 what is the value of x

Answer 1

Answer: x=5

Explanation:

step 1:

put all the coefficients on one side and all the variables on the other, 3x=21-6

step 2: solve the sides, 3x=15

step 3: divide, 3x/3= 15/3

step 4: simplify: x=5

Answer 2

`3x + 6 = 21 \\ 3x = 21 - 6 \\ 3x = 15 \\ x = (15)/(3) \\ x = 5`