Ответ:
x(5x-9)=36
5x-9x=36
-4x=36
x=36:(-4)
x=(-9)
6x-9=36
6x=45
x=45/6
x=7,5
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Ответ:
x(5x-9)=36
5x-9x=36
-4x=36
x=36:(-4)
x=(-9)
6x-9=36
6x=45
x=45/6
x=7,5