2/3у - 1/3 = 59у
2/3у - 59у = 1/3
- 58 1/3у = 1/3
у = 1/3 : (- 58 1/3)
у = - (1/3 : 175/3)
у = - 1/175
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3/4у - 2/3 = 7/12у
3/4у - 7/12у = 2/3
9/12у - 7/12у = 2/3
2/12у = 2/3
1/4у = 2/3
у = 2/3 : 1/4
у = 8/3
у = 2 2/3