How would you solve the equation 3x+6=21

You would subtract 6 from the left and right side. then it would be 3x=15 so then you would divide both sides by 3 and that would give u x=5

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.