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LOONGANALEEZIN
Answered

2. There are 100 kids in the park. The boys are 30 more than the girls. How many girls are there in the park?
Solution:

3. A box is full of red and blue pingpong balls. The red pingpong balls are 5 times the number of blue balls. If there are 60 balls in all, how many of each color of balls are there in the box?
Solution:

YAN PA TULONG

Sagot :

TEIRIAERDEIN

2. let x - no. girls

100 = 30 + x

x = 100 - 30

x = 70 girls

3. let r - red pingpong balls; b for blue

r = 5b > first eqn

60 = b + r > second eqn

substitute r to the 2nd equation

60 = 5b + b

60 = 6b

b = 10

substitute b to the first eqn

r = 5b

r = 5(10)

r = 50

blue = 10 ; red = 50

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