пожалуйста срочно реши уровнени 1)х=2/3 х+1; 2)х-1/2=3/4 х;3)х-2/3=5/6 х;4)1 4/5 у=у+4; 5)2/3 у -1/3=5/9 у; 6)3/4 у-2/3=7/12у 10 баллов
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1. х-2/3х=1
1/3х=1
х=1*3=3
2. х-1/2=3/4х
х-3/4х=1/2
1/4х=1/2
х=2
3. х-5/6х=2/3
1/6х=2/3
х=(2/3)/(1/6)
х=(2/3)*6
х=4
4. 1 4/5у=у+4
9/5у-у=4
4/5у=4
у=5
5. 2/3у-5/9у=1/3
6/9у-5/9у=1/3
1/9у=1/3
у=(1/3)*9
у=3
6.3/4у-7/12у=2/3
9/12у-7/12у=2/3
2/12у=2/3
1/6у=2/3
у=(2/3)*6
у=4