Algebraic expression the number of jelly beans divided into 9 piles

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.

If the tip varies directly with the number of guest which equation represents between the tip,t, and the number of guest,g?

Zahra wants the equation below to have an infinite number of solutions when the missing number is placed in the box.