Question Solve the equation x=10 Evaluate 3x−9=21Move the constant to the right-hand side and change its sign 3x=21+9Add the numbers 3x=30Divide both sides 33x=330Divide the numbers x=330Solution More Steps Evaluate 330Reduce the numbers 110Calculate 10 x=10 Show Solution Rewrite the equation x=10 Evaluate 3x−9=21Move the constant to the right side 3x=30Solution x=10 Show Solution Graph