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100
  • The sum of a number and 20 is three times the number, what is the number?

x + 20 = 3x 

x-x +20=3x-x

20=2x

10=x

x=10

200
  • Tina had Php 300.00 in her wallet. She bought 4 ribbons worth x pesos each. If the money left in her wallet is Php 100.00, how much is the price of each ribbon?

(300- 100)/4 = x 

200/4 = x

50 = x

x=50

300
  • If the perimeter of a square garden is 48 m., what is the length of each side of the garden?

P=4s

48=4s

12=s

s=12

400

The age of Alex is 4, more than 3 times the age of Sonny. The sum of their ages is 32. Find their ages.

 Sonny's Age is 7

 Alex is 25

 

500
  • The difference between the two numbers is 67. The larger number is 3 less than six times the smaller number. Find the two numbers.

Smaller number is 14

Larger number is 81