> solve(4*x-y=3,y);

> solve(-2*x+3*y=1,y);

> plot({4*x-3,2/3*x+1/3},x=-1..2,y=-8..4);

>

>

>

>

> solve(-3*x+5*y-2=0,y);

> solve(2*x-3*y-1=0,y);

> plot({3/5*x+2/5,2/3*x-1/3},x=-2..2);

>

>

>

>

> plot({3/5*x+2/5,2/3*x-1/3},x=-2..22,y=-1..15);

>

>

>

>

> solve(2.67*x-0.38*y=6,y);

> solve(4.19*x+0.23*y=4,y);

> plot({7.026315789*x-15.78947368,-18.21739130*x+17.39130435},x=-3..3,y=-35..5);

>

>

>

>

> solve(2.67*x-0.38*y=6,y);

> solve(4.19*x+0.23*y=4,y);

> solve(7.026315789*x-15.78947368=-18.21739130*x+17.39130435,x);

Esse é o valor de x, o de y basta substituir em qualquer uma das equações acima, ou seja:

> 7.026315789*1.314417804-15.78947368;

O par ordenado será ( 1,314; -6,554 ).

>

>

>

>

> solve(3*x-2*y=4,y);

> solve(-6*x+4*y=7,y);

> plot({3/2*x-2,3/2*x+7/4},x=-3..3);

>

>

>

>

> plot({3*x-4,3*x+2,3*x-1,3*x-2},x=-3..3);

>

>

>

>

> implicitplot({-4*x+y=+2,8*x-2*y=-4},x=-3..3,y=-5..5);

>

>

>

>

> implicitplot({p=3/2*q,p=81-3/4*q},q=-10..10,p=-10..15);

>

>

>

> implicitplot({p=3/2*q,p=81-3/4*q},q=-10..50,p=-10..80);