Question 180041
16 + 11 = 27 ... not 26


let g=girls and b=boys


"a math class of 26 students" __ g + b = 26 __ g = 26 - b


"each girl drew a triangle and each boy drew a rectangle. There were 92 slides in all"
__ I'm thinking "sides", not slides...
__ 3g + 4b = 92


substituting __ 3(26-b) + 4b = 92  __  78 - 3b + 4b = 92


subtracting 78  __  b = 14


substituting  __  g + (14) = 26


subtracting 14  __  g = 12