Question

помогите решить систему,

Answer 1

2x - y = - 11
y = 2x + 11
( 3x - 1 )/2 + ( y/3 ) = 2
3( 3x - 1 ) + 2y = 12
9x - 3 + 2y = 12
9x - 3 + 2( 2x + 11 ) = 12
9x + 4x + 22 = 15
13x = - 7
X = - 7/13
y = 2•( - 7/13 ) + 11 = - 14/13 + 11 = - 1 ( 1/13 ) + 10 ( 13/13 ) = 9 12/13
Ответ ( - 7/13 ; 9 12/13 )