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2x - 3y = -2
-----------------
8x = 4
x = 0,5
2x - 3y = -2
2*0,5 - 3y = -2
-3y = -3
y = 1
y = 1
x = 0,5
2)8x + 5y = 13
6x - 2y = 4
16x + 10y = 26
30x - 10y = 20
-------------------
46x = 46
x = 1
6x - 2y = 4
6*1 - 2y = 4
-2y = -2
y = 1
y = 1
x = 1