Prove that Triangle ADC is congruent to Triangle CBA

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

The square root of 9x plus 7 plus the square rot of 2x equall to 7

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.