Question 623017
Two of the top-grossing concert tours were by a jazz band and a rock band. Together the two tours visited 169 cities. The jazz band visited 91 cities more than the rock band. 


How many cities did the jazz band visit?


Let the amount of cities visited by the jazz and rock bands be j and r, respectively


Then, j + r = 169 ------- eq(i)
Also, j = r + 91 --- j - r = 91 ---- eq (ii) 
2j = 260 ----- Adding eqs (i) and (ii) 


j, or the amount of cities that the jazz band visited = {{{260/2}}}, or {{{highlight_green(130)}}}


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