1)9х+2y-4 =0 { 8x+y-2=0 2)5u+7v+3=0 { 10u-v+6=0

Question

1)9х+2y-4 =0
{
8x+y-2=0
2)5u+7v+3=0
{
10u-v+6=0

Answer 1

1) 9x+2(2-8x)=0 { y=2-8x
9x+4-16x=0 { y=2-8x
-7x=-4 { y=2-8x
x=4/5 { y=2-8(4/5)
x=4/5 { y=2-32/5
x=4/5 { y=10/5 - 32/5
x=4/5 { y= - 22/5
x=4/5 { y= -4,4

2) 5u+7(6+10u)+3=0 { v=6+10u
5u+42+70u+3=0 { v=6+10u
75u=-45 { v=6+10u
u=-0,6 { v=6+10×-0,6
u=-0,5 { v=0