JuanTorres7
27.01.2021 •
Mathematics
There are 32 red or blue marbles in a bag. The number of red marbles is 4 more than 3 times the number of blue marbles. Write and solve a system of linear equations. How many red marbles are in the bag? How many blue marbles are in the bag?
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Ответ:
# red marbles = 25
# blue marbles = 7
Step-by-step explanation:
r + b = 32
r = 4 + 3b
substitute '4 + 3b' for 'r' in the 1st equation
4 + 3b + b = 32
4 + 4b = 32
4b = 28
b = 7
red = 32 - 7
r = 25
Ответ:
45
Step-by-step explanation: