Help with 2 guess and check problems

[From: ] [author: ] [Date: 12-04-13] [Hit: ]

y = 24/3 = 8-1.2.......

1. Two times a number is 2 less than 20. What is the number?
2. Three times a number is 6 less than 30. What is the number?

1.
2x = 20 - 2
2x = 18
x = 18/2 = 9

2.
3y = 30 - 6
3y = 24
y = 24/3 = 8

1. 9x2=18
2. 8x3=24

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