Forty-five is equal to twelve more than thrice a number.

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45= 12+ 3x
bring 3x to the left and 45 to the right so the 45 became -45 and 3x came - 3x
-3x = 12 - 45
subtract 12 - 45 it becomes negative so 45 - 12 is 33 then put the negative sign
- 3x = - 33
and divide it by -3 so it will become x and 11
-3x/-3= x and -33/ -3 = 11
answer : x = 11

Answers

2014-02-04T17:00:59+08:00
45= 12+ 3x
bring 3x to the left and 45 to the right so the 45 became -45 and 3x came - 3x
-3x = 12 - 45
subtract 12 - 45 it becomes negative so 45 - 12 is 33 then put the negative sign
- 3x = - 33
and divide it by -3 so it will become x and 11
-3x/-3= x and -33/ -3 = 11
answer : x = 11

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