Question

A box contains 225 marbles which are either red or blue. there are 31 more blue marbles than red marbles. how many blue marbles are in the box? blue marbles

Answer 1

Let x represent the number of red marbles, then blue marbles are represented by x + 31

red +  blue  = 225

x    +  x + 31  =  225

2x + 31 = 225

2x = 194

 x = 97

Blue: x + 31 = 97 + 31  = 128

Answer: 128 blue marbles

Answer 2

225-35=194/2 because there is two colors red and blue you divide it and then answer is 97 and then you add  35+97=132 so there are 132 blue marbles