How to write 120 + 25x = 45x in a real world situation

120 = 45x - 25x

120 = 20x

120/20 = x

6 = x

6x 45 = 270

6x 25 = 150

270 - 150 = 120

Our teacher had 45 bags of skittles with 6 skittles in each bag. (45x6 = 270)

She also had 25 bags of gum with 6 pieces of gum in each bag. (25x6 = 150)

How many did she save altogether for another day? (270-150)

She saved a total of 120 pieces of skittle and gum for another day.