Question 425022

the elimination method: 

1.    {{{3x-2y=5}}}
      {{{2x+3y=12}}}


*[invoke solving_linear_system_by_elimination 3, -2, 5, 2, 3, 12]


2.    {{{4x+3y+3=0}}}
      {{{8x=9y-1}}}

or {{{4x+3y=-3}}}
   {{{8x-9y=-1}}}


*[invoke solving_linear_system_by_elimination 4, 3, -3, 8, -9, -1]


this ones either substitution, elimination or comparison methods:

3.    {{{0.3x-0.5y=1.2}}}
      {{{0.7x-0.2y=-0.1}}}

*[invoke linear_substitution "x", "y", 0.3, -0.5, 1.2, 0.7, -0.2, -0.1]


4.    {{{x/3+y/4=2}}}
      {{{2x/3-y/2=0}}}

or

{{{(1/3)x+(1/4)y=2}}}

{{{(2/3)x-(1/2)y=0}}}


*[invoke linear_substitution "x", "y", 1/3, 1/4, 2, 2/3, -1/2, 0]