[tex]-6(2x+3)=54\\-12x-18=54\\-12x=54+18\\-12x=72\\x=-6[/tex]
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[tex]-6(2x+3)=54\\-12x-18=54\\-12x=54+18\\-12x=72\\x=-6[/tex]
2х+3=-9
2х=-9-3
2х=-12
х=-6