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zirina39
@zirina39
July 2022
1
16
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4x - 9 = 2x + 7 решите прошууу
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vmaluga2011
Verified answer
4х-9=2х+7
4х-2х=7+9
2х=16
х=16:2
х=8
Проверка:
4*8-9=2*8+7
32-9=16+7
23=23
2 votes
Thanks 0
zirina39
реши этот 144 - ( х : 11 + 21 ) * 2 = 14
vmaluga2011
144-(х:11+21)*2=14; 2(х:11+21)=144-14; 2(х:11+21)=130; х:11+21=130:2; х:11+21=65; х:11=65-21; х:11=44; х=44*11; х=484; Проверку сделал: все сошлось
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Answers & Comments
Verified answer
4х-9=2х+74х-2х=7+9
2х=16
х=16:2
х=8
Проверка:
4*8-9=2*8+7
32-9=16+7
23=23