When we combine like terms on the left side of the equation, we have:
18x - 21 = 33
To isolate the variable x, we add 21 to both sides of the equation:
18x - 21 + 21 = 33 + 21
18x = 54
Finally, we divide both sides of the equation by 18 to solve for x:
18x / 18 = 54 / 18
x = 3
9x + 9x - 21 = 33
1 answer