Question 672717

1.
{{{3x-y=5}}}
{{{7x-2y=15}}}

*[invoke solving_linear_system_by_substitution 3, -1, 5, 7, -2, 15]


2.
{{{3a=2-b}}}
{{{3a=7-b}}}
---------------

{{{3a+b=2}}}......let {{{x=a}}} and {{{y=b}}}
{{{3a+b=7}}}

*[invoke solving_linear_system_by_substitution 3, 1, 2, 3, 1, 7]


3.

{{{3x-y=0}}}
{{{2x-y=1}}}

*[invoke solving_linear_system_by_substitution 3, -1, 0, 2, -1, 1]