Question

Помогите решить. {6(x-3)=7y-1;
2(y+6)=3x+2;

Answer 1

$displaystyleleft { {{6(x-3)=7y-1} atop {2(y+6)=3x+2}} right. ~~~Leftrightarrow~~~left { {{6x-18=7y-1} atop {2y+12=3x+2}} right.~~~Leftrightarrow\ \ \ displaystyleleft { {{6x-18=7y-1} atop {-3x+10=-2y~~~|times2}} right. ~~Leftrightarrow~~left { {{6x-17=7y} atop {-6x+20=-4y}} right. ~~+~~Leftrightarrow\ \ \displaystyleleft { {{3=3y} atop {6x-20=4y}} right. ~~~Leftrightarrow~~~left { {{y=1} atop {6x=20+4cdot 1}} right. ~~~Leftrightarrow$

$displaystyleboldsymbol{left { {{y=1} atop {x=4}} right.}$