Уравнение пж помогите 1)5×(х-7)=0 2) (9-х)×4=0 3)6×(х-16)+7=7 4) (11-х)×3+28=28. Created by zaranya. matematika-ru

Уравнение пж помогите 1)5×(х-7)=0 2) (9-х)×4=0 3)6×(х-16)+7=7 4) (11-х)×3+28=28...

RA55oL 1) 5x-35=0
5x=35
x=7
2)36-4x=0
-4x=-36|:-1
4x=36
x=9

lena85 1) 5×(х-7)=0
5х-35=0
5х=35
х=7

2)(9-х)×4=0
36-4х=0
36=4х
х=9

3)6×(х-16)+7=7
6х-96+7=7
6х=7-7+96
6х=96
х=16

4)(11-х)×3+28=28
33-3х+28=28
-3х=28-28-33
-3х=-33
х=11

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