Ответ:

Объяснение:

{5(x-3y)=2x+27

{3(x-6y)=9y+15

{5x-15y=2x+27

{3x-18y=9y+15

{3x-15y=27   |-1

{3x-27y=15   |1

{-3x+15y=-27

+

{3x-27y=15

-12y=-12

y=1

3x-27*1=15

3x-27=15

3x=42

x=14

Ответ:

[tex]x=14;y=1[/tex]

Объяснение:

[tex]\left \{ {{5(x-3y)=2x+27} \atop {3(x-6y)=9y+15}} \right.\\\\\left \{ {{5x-15y=2x+27} \atop {3x-18y=9y+15}} \right.\\\\\left \{ {{5x-2x-15y=27} \atop {3x-18y-9y=15}} \right.\\\\\left \{ {{3x-15y=27} \atop {3x-27y=15\; \; |*(-1)}} \right.\\\\\left \{ {{3x-15y=27} \atop {-3x+27y=-15}} \right. +\\\\12y=12\\y=1\\\\3x-15*1=27\\3x-15=27\\3x=27+15\\3x=42\\x=14[/tex]