Help plz 20 points question is in the pic

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Me! last question, and i'm stuck! write the algebraic expression that models the word phrase. the product of 2 divided by the number h and 8 more than the number k

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny