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Shmolnaver
@Shmolnaver
July 2022
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Решить уравнения за 7класс
0,15(x-4)=9,9-0,3*(x-1)
(0,7x-2,1)-(0,5-2x)=0,9(3x-1)+0,1
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МаріяАнатолівна
А)0,15(x-4)=9,9-0,3*(x-1)
0,15x-0.6=9.9-0.3х+0.3
0,15x+0.3х=0.6+0.3+9.9
0.18х=10.8
х=60
Б)(0,7x-2,1)-(0,5-2x)=0,9(3x-1)+0,1
0,7x-2,1-0,5+2x=2.7х-0.9+0.1
0,7x-0,7x+2x=2,1+0,5-0.9+0.1
2х=1.8
х=0.9
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МаріяАнатолівна
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Answers & Comments
0,15x-0.6=9.9-0.3х+0.3
0,15x+0.3х=0.6+0.3+9.9
0.18х=10.8
х=60
Б)(0,7x-2,1)-(0,5-2x)=0,9(3x-1)+0,1
0,7x-2,1-0,5+2x=2.7х-0.9+0.1
0,7x-0,7x+2x=2,1+0,5-0.9+0.1
2х=1.8
х=0.9