帮忙解下2元一次方程要过程1.{y=2x{2x+y=162.{x+y=13{x-y=73.{4x+3y=5{x-2y=44.{3(x-1)=y{5(y-1)=3(x+5)5.{x=3y{2x-y=56.{3x-2y=2{3x+y=8

Question

帮忙解下2元一次方程
要过程
1.
{y=2x
{2x+y=16
2.
{x+y=13
{x-y=7
3.
{4x+3y=5
{x-2y=4
4.
{3(x-1)=y
{5(y-1)=3(x+5)
5.
{x=3y
{2x-y=5
6.
{3x-2y=2
{3x+y=8

Answer 1

1.
{y=2x
{2x+y=16 x=4 y=8
2.
{x+y=13
{x-y=7 x=10 y=3
3.
{4x+3y=5
{x-2y=4 x=2 y=-1
4.
{3(x-1)=y
{5(y-1)=3(x+5) x=35/12 y=23/4
5.
{x=3y
{2x-y=5 x=3 y=1
6.
{3x-2y=2
{3x+y=8 x=2 y=2