Question 443108
Get in this form ax+by =c
-----------
x+5y=2
3x-y=-19

Multiply the the first by -3

-3x -15y =-6
3x -y  = -19

Add the two together

0  + -16y = -25

y = 25/16

x + 5(25/16) = 2
x + 125/16 = 2
x = 32/16 - 125/16
x = -93/16

x = -93/16  y= 25/16

Let's check this:
*[invoke linear_substitution "x", "y", 1, 5, 2, 3, -1, -19 ]

Which in decimal form is the same as before.