Will mark brainlist whoever answers first

Algebra 1: unit 6 part 2 of test a) the table shows a linear function. x 0 1 2 3 5 13 21 29 37 45 53 (a) determine the difference of outputs of any two inputs that are 1 unit apart. show your work. (b) determine the difference of outputs of any two inputs that are 2 units apart. show your work.

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

How to solve a simultaneous equation involved with fractions?