Solving system of equations by elimination

1.) -14 = -20y - 7x
10y + 4 = 2x

2.) 3 + 2x - 7y = 10x
-3 - 7y = 10x

1). On the second equation I subtracted 10y from both sides. So I get:
-20y-7x=-14
-10y+2x=4
I then multiplied the 2nd equation by -2
-20y-7x=-14
20y-4x=-8
You combine like terms
-11x=-22
Divide both terms by -11
x=2
Then plug in x
-20y-7(2)=-14
-20y-14=-14
Add 14 on both sides
-20y=0
Divide both sides by -20
y=0
So in conclusion:
x=2 y=0

2). Add 7y in both equations so I get:
10x+7y=3
10x+7y=-3
So I multiply -1 on the top side.
-10x-7y=-3
10x+7y=3
Add like terms
0=0
No solution is the answer.

Do the math. she originally had 50 dollars on her gift card and she had 12 dollars left on her gift card after she finished her shopping spree. if you subtract 50 minus 12 you get thirty eight dollars as your answer. so therefore, ciara spent 38 dollars total o