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(x + 2y) / 3 + (x +y) / 2 = 3/ 2 / * 6
(x - 2y) / 5 - (2x + y) / 2 = -1 / * 10
2(x + 2y) + 3(x +y) = 3 * 3
2(x - 2y) - 5(2x +y) = -10
2x + 4y + 3x + 3y = 9
2x - 4y - 10x - 5y = -10
5x + 7y = 9 / *8
-8x - 9y = -10 / *5
40x + 56y = 72
-40x - 45y = -50
--------------------- +
11y = 22
y = 2
5x + 7y = 9
5x + 7 * 2 = 9
5x + 14 = 9
5x = 9 - 14
5x = -5
x = -1
odp.
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(x + 2y) / 3 + (x +y) / 2 = 3/ 2 / * 6
(x - 2y) / 5 - (2x + y) / 2 = -1 / * 10
2(x + 2y) + 3(x +y) = 3 * 3
2(x - 2y) - 5(2x +y) = -10
2x + 4y + 3x + 3y = 9
2x - 4y - 10x - 5y = -10
5x + 7y = 9 / *8
-8x - 9y = -10 / *5
40x + 56y = 72
-40x - 45y = -50
--------------------- +
11y = 22
y = 2
5x + 7y = 9
5x + 7 * 2 = 9
5x + 14 = 9
5x = 9 - 14
5x = -5
x = -1
odp.
x = -1
y = 2