{2x -y = -8 ;
{ (x-1)/2 +y/3 =1 .
Ответ: x=1 ; y=10 .
Объяснение:
{2x - y = - 8 ; --------- { y =2x+8
{ (x - 1)/2 +y/3 =1.-----{( x - 1 )/2 +(2x+8)/3 =1
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(x - 1)/2 +(2x+8)/3 =1 || *6
3(x - 1) +2(2x+8) =6 ;
3x - 3 + 4x +16 =6 ;
7x +13 =6 ;
7x = 6 - 13 ;
7x=7 ;
x = 1 . ⇒ y =2x+ 8 = 2*1+8 =2+8=10 .
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y =2x+8 =2*1+8 =2+8=10 .
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{2x -y = -8 ;
{ (x-1)/2 +y/3 =1 .
Ответ: x=1 ; y=10 .
Объяснение:
{2x - y = - 8 ; --------- { y =2x+8
{ (x - 1)/2 +y/3 =1.-----{( x - 1 )/2 +(2x+8)/3 =1
-----------
(x - 1)/2 +(2x+8)/3 =1 || *6
3(x - 1) +2(2x+8) =6 ;
3x - 3 + 4x +16 =6 ;
7x +13 =6 ;
7x = 6 - 13 ;
7x=7 ;
x = 1 . ⇒ y =2x+ 8 = 2*1+8 =2+8=10 .
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y =2x+8 =2*1+8 =2+8=10 .