Question

Prosze o pomoc nic nie ogarniam to są układy równań jak cos 3x - 2y = 21
4x = 6y = 2
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a - 3b = - 23
3a- b = -13
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6m - 2n = 3
9m=6n = 9
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2b = 3a+35
14 = 3a + 35
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8x - 3 = 9y
5=6y + 4x
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2n - 9 = 11m
2m + 8 = n