Question

$6x - 9 - 2(1 + x) = x - 9$
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Answer 1

$\huge\underline {Answer=20}$

6x-9-2 (1+x) = x-9

6x-9-2+(-2x) = x-9

6x-11-2x = x-9

6x-2x-x =9+11

3x-x-x = 20

3x-2x = 20

1x = 20

$\huge{\bold{\star{\fcolorbox{black}{red}{x=20}}}}$