Question

1) зх+3у=114 4х+2у=14 решите и вот еще 2) 2х+3н \ 4 +3х+2у \ 5 =-1\20 3х+4у \ 2 - 5х-у \ 3 =43 \ 6 ))решите))

Answer 1

1)

{3x+3y=114,

{4x+2y=14;

{x+y=38,

{-2x-y=-7;

-x=31,

x=-31,

-31+y=38,

y=69.

2)

{(2x+3y)/4+(3x+2y)/5=-1/20,

{(3x+4y)/2-(5x-y)/3=43/6;

{5(2x+3y)+4(3x+2y)=-1,

{3(3x+4y)-2(5x-y)=43;

{10x+15y+12x+8y=-1,

{9x+12y-10x+2y=43;

{22x+23y=-1,

{-x+14y=43;

{22x+23y=-1,

{-22x+308y=946;

331y=945,

y=945/331,

22x+23*945/331=-1,

22x=-22066/331,

x=1003/331.