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5x + 3y = 14 |x2 -------> 10 x + 6y = 28
------------------------ -
- 10y = -30
y = 30/10
y = 10
10x - 4y = -2
10 x- 4(10) = -2
10X - 40 = -2
10x - 40 = -2
10x = -2 +40
10x = 38
x = 3,8