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tsvetkov9911
@tsvetkov9911
August 2022
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срочно помогите с.р!!!!!!!!!!!!!!!!!!°°°°°°
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zhenyaM2002
Verified answer
5,18 : (123,4 - х) = 1,4
123,4 - х = 5,18 : 1,4
123,4 - х = 3,7
х = 123,4 - 3,7
х=119,7
проверим:
5,18 : (123,4 - 119,7) =5,18 : 3,7 = 518/370 = 1,4
2,1х +4,6х -0,8 = 1,21
6,7х - 0,8=1,21
6,7х=1,21 +0,80
6,7х= 2,01
х=2,01/6,7 =201/670
х= 0,3
проверим: 2,1 *0,3 + 4,6 *0,3 - 0,8 = 0,63+1,38-0,8=2,01-0,80=1,21
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Answers & Comments
Verified answer
5,18 : (123,4 - х) = 1,4123,4 - х = 5,18 : 1,4
123,4 - х = 3,7
х = 123,4 - 3,7
х=119,7
проверим:
5,18 : (123,4 - 119,7) =5,18 : 3,7 = 518/370 = 1,4
2,1х +4,6х -0,8 = 1,21
6,7х - 0,8=1,21
6,7х=1,21 +0,80
6,7х= 2,01
х=2,01/6,7 =201/670
х= 0,3
проверим: 2,1 *0,3 + 4,6 *0,3 - 0,8 = 0,63+1,38-0,8=2,01-0,80=1,21