Solve the following system of equations. express your answer as an ordered pair in the format (a, b), with no spaces between the numbers or symbols
2x+7y=-1 and 4x-3y=-19

Multiply the equation 2x+7y=-1 by -2

add to othe equaiton
4x-3y=-19
-4x-14y=2 +
0x-17y=-17

-17y=-17
divide both sides by -17
y=1

sub back
2x+7y=-1
2x+7(1)=-1
2x+7=-1
minus 7 from both sides
2x=-8
divide both sides by 2
x=-4

x=-4
y=1
(x,y) is normal form
(-4,1) is answer

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