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(2х - 1)(3х+7)-(1+6х)(х+2)=4
6х^2+14х-3х-7-(х+2+6х^2+12х)=4
6х^2+11х-7-х-2-6х^2-12х=4
-9-2х=4
-2х=4+9
-2х=13
х=13:(-2)
х=-6,5
ответ:х=-6,5.
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(2х - 1)(3х+7)-(1+6х)(х+2)=4
6х^2+14х-3х-7-(х+2+6х^2+12х)=4
6х^2+11х-7-х-2-6х^2-12х=4
-9-2х=4
-2х=4+9
-2х=13
х=13:(-2)
х=-6,5
ответ:х=-6,5.