Six times the sum of a number and three is equal to two times the number decreased by seven.

6(x+3)=2x-7
6x+18=2x-7
6x-2x=-7-18
4x=-25
X=-6.25

X = 1
I hope this is what you where looking for.

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.