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GreapZoro
@GreapZoro
August 2022
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Решить уравнения плиз
1) 5,76+4,8x-0,05x=6.99x-1,995x+5,13
2)1 4/5x-2 1/2-2=-2 1/3-1/6-1/5
3) (3x-7)(5x+2)=0
4) 0.9(x-5)+2/5(6-x)=2/5+0.3(x+20)-0.2x
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akimovanastya26
1) 5,76+4,8х-0,05х=6,99х-1,995х+5,13
4,8х-0,005х-6,99х+1,995х=5,13-5,76
-0,2х=-0,63 /: (-0,2)
х=0,315
3) (3х-7)*(5х+2)=0
3х-7=0 или 5х-2=0
3х=7 5х=2
х= 2целых1/3 х=0,4
3 votes
Thanks 2
лора1728
1) 4,75х-6,99х-1,995х= 5,13-5,76
-4,235х =- 0,63
х= 0,14876
2) 9/5х= 2 1/2+2-2 1/3-1/6-1/5
9/5х=12/6-1/5=66/30=11/5
х= 11/5÷9/5=11/9
х= 1 2/9
3) 15х^2-6х-35х-14=0
15х^2-41х-14=0
далее по формуле D( дискриминант ) найти х
4) 0,9х- 4,5+12/5-2/5х= 2/5+0,3х+6-0,2х
1/2х-1/10х= 3/2+2/5+6=79/10
х= 79/10÷1/2=79/5=15 4/5
0 votes
Thanks 0
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Answers & Comments
4,8х-0,005х-6,99х+1,995х=5,13-5,76
-0,2х=-0,63 /: (-0,2)
х=0,315
3) (3х-7)*(5х+2)=0
3х-7=0 или 5х-2=0
3х=7 5х=2
х= 2целых1/3 х=0,4
-4,235х =- 0,63
х= 0,14876
2) 9/5х= 2 1/2+2-2 1/3-1/6-1/5
9/5х=12/6-1/5=66/30=11/5
х= 11/5÷9/5=11/9
х= 1 2/9
3) 15х^2-6х-35х-14=0
15х^2-41х-14=0
далее по формуле D( дискриминант ) найти х
4) 0,9х- 4,5+12/5-2/5х= 2/5+0,3х+6-0,2х
1/2х-1/10х= 3/2+2/5+6=79/10
х= 79/10÷1/2=79/5=15 4/5