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2x + 3y = 19
x = 1 - 2y
2x + 3y = 19
2(1 - 2y) + 3y = 19
2 - 4y + 3y = 19
- y = 17
y = - 17
x = 1 - 2y
x = 1 - 2(- 17)
x = 35
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- 3x + 5y = 8
4x - 2y = - 6
- 3x + 5y = 8
5y - 8 = 3x
4x - 2y = - 6
x + 5y - 8 - 2y = - 6
x + 4y = 2
x = 2 - 4y
5y - 8 = 3x
5y - 8 = 3(2 - 4y)
5y - 8 = 6 - 12y
17y = 14
y = 14/17
x = 2 - 4y
x = 2 - 56/17
x = - 22/17