решите уравнения. 1)3,07x-2,691=7,83+0,97x 2)32,7-18,3y=32,42=16,7y 3)39,24+11,52x=14,19-13,48x
1) 3, 07х - 2, 691 = 7, 83 + 0, 97х
3,07х - 0,97 =7,83 + 2, 691
2,1 х = 10, 521
х = 5, 01
1) 3,07х-2,691 = 7,83+0,97х
3,07х-0,97х = 7,83+2,691
2,1х = 10,521
х = 10,521: 2,1
х =5,01
3,07*5,01-2,691 = 7,83+0,97*5,01
15,3807-2,691 = 7,83+4,8597
12,6897 = 12,6897
Ответ: 5,01.
2) 32,7-18,3у = 32,42+16,7у
32,7-32,42 = 16,7у+18,3у
0,28 = 35у
у = 0,008
32,7-18,3*0,008 = 32,42+16,7*0,008
32,7-0,15 = 32,42+0,13
32,55 = 32,55
Ответ: 0,008.
3) 39,24+11,52х = 14,19-13,48х
11,52х+13,48х = 14,19-39,24
25х =-25,05
х = -1,002
39,24+11,52*(-1,002) = 14,19-13,48*(-1,002)
39,24-11,54 = 14,19+13,51
27,7 = 27,7
Ответ: -1,002.
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Answers & Comments
1) 3, 07х - 2, 691 = 7, 83 + 0, 97х
3,07х - 0,97 =7,83 + 2, 691
2,1 х = 10, 521
х = 5, 01
1) 3,07х-2,691 = 7,83+0,97х
3,07х-0,97х = 7,83+2,691
2,1х = 10,521
х = 10,521: 2,1
х =5,01
3,07*5,01-2,691 = 7,83+0,97*5,01
15,3807-2,691 = 7,83+4,8597
12,6897 = 12,6897
Ответ: 5,01.
2) 32,7-18,3у = 32,42+16,7у
32,7-32,42 = 16,7у+18,3у
0,28 = 35у
у = 0,008
32,7-18,3*0,008 = 32,42+16,7*0,008
32,7-0,15 = 32,42+0,13
32,55 = 32,55
Ответ: 0,008.
3) 39,24+11,52х = 14,19-13,48х
11,52х+13,48х = 14,19-39,24
25х =-25,05
х = -1,002
39,24+11,52*(-1,002) = 14,19-13,48*(-1,002)
39,24-11,54 = 14,19+13,51
27,7 = 27,7
Ответ: -1,002.