babygurl27732
12.07.2019 •
Mathematics
Abox 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
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Ответ:
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
128 blue marbles
Ответ:
a, b, d, f
Step-by-step explanation:
1. E
2. D
3. G
4. E
5. N
6. U
7. I
8. T
9. Y