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kotegova03
@kotegova03
July 2022
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5
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помогите решить примеры
2) 9(5х+13)-143=109
3) 15(13х-7)-191=94
5) (2х+39)/5=13
Пример-7(х+8)-25=66
7х+56-25=66
7х=66-56+25
7х=35
х=35/7
х=5
---------------------------------------------
7(5+8)-25=66
66=66
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Answers & Comments
lidiakolupaewa
2) 9(5х+13)-143=109
45x+117-143=109
45x=109-117+143
45x=135
x=3
3) 15(13х-7)-191=94
195x-105-191=94
195x=94+105+191
195x=390
x=2
5) (2х+39)/5=13
0.4x+7.8=13
0.4x=13-7.8
0.4x=5.2
x=13
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Answers & Comments
45x+117-143=109
45x=109-117+143
45x=135
x=3
3) 15(13х-7)-191=94
195x-105-191=94
195x=94+105+191
195x=390
x=2
5) (2х+39)/5=13
0.4x+7.8=13
0.4x=13-7.8
0.4x=5.2
x=13