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KKarin
@KKarin
August 2022
1
4
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помогите все 4 уравнения решить пожалуйста)заранее спасибо )
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Oksana14011977
1)
12х - 35 + 7х = 98
19х - 35 = 98
19х = 98 + 35
19х = 133
х = 133 : 19
х = 7
проверка:
12 * 7 - 35 + 7 * 7 = 98
84 - 35 + 49 = 98
98 = 98
2)
25 * (х + 1) - 16 = 59
25х + 25 - 16 = 59
25х + 9 = 59
25х = 59 - 9
25х = 50
х = 50 : 25
х = 2
проверка:
25 * (2 + 1) - 16 = 59
25 * 3 - 16 = 59
75 - 16 = 59
59=59
3)
13 * (х + 6) - 72 = 123
13х + 78 - 72 = 123
13х + 6 = 123
13х = 123 - 6
13х = 117
х = 117 : 13
х = 9
проверка:
13 * (9 + 6) - 72 = 123
13 * 15 - 72 = 123
195 - 72 = 123
123 = 123
4)
77 + 8 * (х - 5) = 125
77 + 8х - 40 = 125
37 + 8х = 125
8х = 125 - 37
8х = 88
х = 88 : 8
х = 11
проверка:
77 + 8 * (11 - 5) = 125
77 + 8 * 6 = 125
77 + 48 = 125
125 = 125
2 votes
Thanks 2
KKarin
почему в 4 написано 37 , р ?
KKarin
а все поняла
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Answers & Comments
12х - 35 + 7х = 98
19х - 35 = 98
19х = 98 + 35
19х = 133
х = 133 : 19
х = 7
проверка:
12 * 7 - 35 + 7 * 7 = 98
84 - 35 + 49 = 98
98 = 98
2)
25 * (х + 1) - 16 = 59
25х + 25 - 16 = 59
25х + 9 = 59
25х = 59 - 9
25х = 50
х = 50 : 25
х = 2
проверка:
25 * (2 + 1) - 16 = 59
25 * 3 - 16 = 59
75 - 16 = 59
59=59
3)
13 * (х + 6) - 72 = 123
13х + 78 - 72 = 123
13х + 6 = 123
13х = 123 - 6
13х = 117
х = 117 : 13
х = 9
проверка:
13 * (9 + 6) - 72 = 123
13 * 15 - 72 = 123
195 - 72 = 123
123 = 123
4)
77 + 8 * (х - 5) = 125
77 + 8х - 40 = 125
37 + 8х = 125
8х = 125 - 37
8х = 88
х = 88 : 8
х = 11
проверка:
77 + 8 * (11 - 5) = 125
77 + 8 * 6 = 125
77 + 48 = 125
125 = 125