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01293847
@01293847
July 2022
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4(х-2)+2(х+3)=-10
|2х+8|=14
(х+4)(х+6)(х+7)=0
3.2у+1.5=1+1.6(2у+1)
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Матвей21221211
1) 4 (х - 2) + 2 (х + 3)= -10;
4х - 8 + 2х + 6 = -10;
6х -2 = -10;
6х = -8;
х = -8/6;
2) |2х + 8| = 14;
|х + 4| = 7;
|х| + 4 = 7;
|х| = 3;
х1 = -3; х2 = 3;
3) (х + 4)(х + 6)(х + 7) = 0;
х + 4 = 0 , или х + 6 = 0, или х + 7 = 0;
х1 = -4; х2 = -6; х3 = -7;
4) 3.2у + 1.5 = 1 + 1.6 (2у + 1);
32у + 15 = 10 + 16 (2у + 1);
32у + 15 = 25 + 32у;
32у - 32у = 25 - 15;
0 = 10; ∅
1 votes
Thanks 1
01293847
а почему в 4 точки убрал?
Матвей21221211
умножил обе стороны на 10
Матвей21221211
таким образом, убрав все точки ...
Матвей21221211
Выглядит это так: 10(3.2у+1.5)=10(1+1.6(2у+1))
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Answers & Comments
4х - 8 + 2х + 6 = -10;
6х -2 = -10;
6х = -8;
х = -8/6;
2) |2х + 8| = 14;
|х + 4| = 7;
|х| + 4 = 7;
|х| = 3;
х1 = -3; х2 = 3;
3) (х + 4)(х + 6)(х + 7) = 0;
х + 4 = 0 , или х + 6 = 0, или х + 7 = 0;
х1 = -4; х2 = -6; х3 = -7;
4) 3.2у + 1.5 = 1 + 1.6 (2у + 1);
32у + 15 = 10 + 16 (2у + 1);
32у + 15 = 25 + 32у;
32у - 32у = 25 - 15;
0 = 10; ∅