1 x + 1 y = 7 .............1 Total value 15 x + 28 y = 131 .............2 Eliminate y multiply (1)by -28 Multiply (2) by 1 -28 x -28 y = -196 15 x + 28 y = 131 Add the two equations
-13 x = -65 / -13 x = 5 plug value of x in (1) 1 x + 1 y = 7 5 + y = 7 y = 7 -5 y = 2 y = 2 x= 5 plain shirts y= 2 fancy shirts
