-x-4+5(x+3)<span>=5(-1-x)-2
-x-4+5x+15</span><span>=-5-5x-2
-x+5x+5x</span><span>=-5-2+4-15
9x</span><span>=-18
</span><span>x=-2
Ответ:x</span><span>=-2</span>
4х+у=-15
3х-2у=-15
8х+2у=-30
3х-2у=-15
11х=-45
х=-45/11
3*(-45/11)-2у=-15
у=15/11
(х, у) =(-45/11; 15/11)
4*(-45/11)+15/11=-15
3*(-45/11)-2*15/11=-15
-15=-15
-15=-15
(х,у)=(-45/11;15/11)
20ay-20ay+4ay+16y2-6a2-24ay=-20ay+16y2-6a2(помойму так)
(1/2)*√7**(1/7)*√28=(1/2)*(√7)²*(1/7)*2=1
√28=√4*√7=2√7