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victoriareih
@victoriareih
July 2022
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Помогите, пожалуйста, срочно!
а) 56-2х=36
б) 34-2*(2х-9)=28
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Lisa8888
А) -2х=36-56
-2х=-20 |:(-1)
2х=20
х=20:2=10
б) 34-4х+18=28
-4х=28-18-34
-4х=-24 |:(-1)
4х=24
х=24:4=6
1 votes
Thanks 1
Виктория20151213
34 - 2 * (2 * 6 - 9) = 28
34 - 2 * (12 - 9) = 28
34 - 2 * 3 = 28
34 - 6 = 28
28 = 28
0 votes
Thanks 1
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Answers & Comments
-2х=-20 |:(-1)
2х=20
х=20:2=10
б) 34-4х+18=28
-4х=28-18-34
-4х=-24 |:(-1)
4х=24
х=24:4=6
34 - 2 * (12 - 9) = 28
34 - 2 * 3 = 28
34 - 6 = 28
28 = 28