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Namuka
@Namuka
July 2022
1
9
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Упростить выражение
2/3(6,9c-1 1/2d)-4,8(5/8c-2,5d)
Решите уравнение
0,4(x-9)-0,3(x+2)=0,7
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Answers & Comments
lena9021208
2/3(6,9c-1 1/2d)-4,8(5/8c-2,5d)= 4,6c- 3*2/3 d - 3c + 12d = 1.6c+ 8*1/3d
0,4(x-9)-0,3(x+2)=0,7;
0,4х-3,6-0,3х-0,6=0,7;
0,1х=0,7+3,6+0,6;
0,1х=4,9;
х=4,9/0,1;
х=49
5 votes
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Answers & Comments
0,4(x-9)-0,3(x+2)=0,7;
0,4х-3,6-0,3х-0,6=0,7;
0,1х=0,7+3,6+0,6;
0,1х=4,9;
х=4,9/0,1;
х=49