Question

A) x+8y-3z=7
-x+3y-2z=1
3x+2y+z=5

Answer 1

Resposta:

(1)   x+8y-3z=7

(2)  -x+3y-2z=1  

(3)   3x+2y+z=5

Explicação passo-a-passo:

(1)  x=-8y+3z+7

x=-8(8/11)+3.0+7

x= -64/11+0+7

x=-64+77/11

x=13/11

(2)  -x+3y-2z=1

-(-9y+3x+7)+3y-2z=1

+8y-3z-7+3y-2z=1

11y-5z-7=1

11y-5z=1+7

11y-5z=8

y=8+5z/11

y=8+5.0/11

y=8/11

(3)   3x+2y+z=5

3(-8y+3z+7)+2(8+5z/11)+z=5

-24y+9z+21+16+5z/11+z=5

-2(8+5z/11)+9z+21+16+5z/11+z=5

-192-120z/11+9z+21+16+5z/11+z=5

-192-120z+99z+231+16+5z+11z/11=55/11

55-5z=55

-5z=55-55

z=0/5

z=0