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vasiliskmavkap7j9d1
@vasiliskmavkap7j9d1
August 2022
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Решить уравнение:
1) -40+2х=4х-42
2) -3(12-2х)=4х-30
3) 0,4(х-3)+2,5=0,5(4+х)
4 - на фото
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Answers & Comments
Hembek
1.-40+2х=4х-42
2х-4х=-42+40
-2х=-2
х=1
2.-3(12-2х)=4х-30
-36+6х=4х-60
6х-4х=-60+36
2х=-24
х=-12
3.0,4(х-3)+2,5=0,5(4+х)
0,4х-1,2+2,5=2+0,5х
0,4х-0,5х=2+1,2-2,5
-0,1х=0,7
х=0,7/(-0,1)
х=-1
4.(2х-1)/3=(3х-2)/5
(2х-1)*5=(3х-2)*3
10х-5=9х-6
10х-9х=-6+5
х=-1
2 votes
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Answers & Comments
2х-4х=-42+40
-2х=-2
х=1
2.-3(12-2х)=4х-30
-36+6х=4х-60
6х-4х=-60+36
2х=-24
х=-12
3.0,4(х-3)+2,5=0,5(4+х)
0,4х-1,2+2,5=2+0,5х
0,4х-0,5х=2+1,2-2,5
-0,1х=0,7
х=0,7/(-0,1)
х=-1
4.(2х-1)/3=(3х-2)/5
(2х-1)*5=(3х-2)*3
10х-5=9х-6
10х-9х=-6+5
х=-1