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Simplify the following expression

Class: Form 1

Subject: Mathematics

Topic: Linear Equations

Lesson Summary

Simplify the expression x-1x-2x+13x hence solve x-1x-2x+13x= 23



Text Answer


š‘„āˆ’1x-2š‘„+13x=3(š‘„āˆ’1)āˆ’1(2š‘„+1)3x
=3š‘„āˆ’3āˆ’2š‘„āˆ’13x
=š‘„āˆ’43x

Solving:
š‘„āˆ’43x=23
3(š‘„āˆ’4)=3š‘„Ɨ2

3š‘„āˆ’12=6š‘„

3š‘„āˆ’6š‘„=12

-3x-3=12-3

x= -4

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