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dustindous911
@dustindous911
July 2022
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Решите пожалуйста 7,8,9
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Назико259
7)6(5х-3)=8(2х+3)
30х-18=16х+3
30х-16х=24+18
14х=42
х=3
8)10(2х-3)-12(3х-2)=3(5-3х)
20х-30-36х-24=15-9х
-16х-6=15-9х
-16х+9х=15+6
-7х=21
х=-3
9)45(х-4)-30(5х+2)=10(х+5)-18(4х-3)
45х-180-150х-60=10х+50-72х+54
-105х-240=-62+104
-105+62=104+240
-43х=344
х=-8
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Answers & Comments
30х-18=16х+3
30х-16х=24+18
14х=42
х=3
8)10(2х-3)-12(3х-2)=3(5-3х)
20х-30-36х-24=15-9х
-16х-6=15-9х
-16х+9х=15+6
-7х=21
х=-3
9)45(х-4)-30(5х+2)=10(х+5)-18(4х-3)
45х-180-150х-60=10х+50-72х+54
-105х-240=-62+104
-105+62=104+240
-43х=344
х=-8