Решите уравнения
[tex]1) \: (120 \div x - 3) \div 2 + 5 = 11 \\ 2) \: 4 \times (85 \div x + 3) - 3 = 29 \\ 3) \: 3 \times (x \div 6 - 7) + 5 = 23 \\ 4) \: x \div 15 + 1.3 = 1.9[/tex]
Помогите умоляю ((
[tex]1) \: (120 \div x - 3) \div 2 + 5 = 11 \\ 2) \: 4 \times (85 \div x + 3) - 3 = 29 \\ 3) \: 3 \times (x \div 6 - 7) + 5 = 23 \\ 4) \: x \div 15 + 1.3 = 1.9[/tex]
Помогите умоляю ((
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(120 : x - 3) : 2 = 6
120 : x - 3 = 12
120 : x = 15
x = 120 : 15
x = 8
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2)
4 * (85 : x + 3) = 32
85 : x + 3 = 8
85 : x = 5
x = 85 : 5
x = 17
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3)
3 * (x : 6 - 7) = 18
x : 6 - 7 = 6
x : 6 = 13
x = 13 * 6
x = 78
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4)
x : 15 = 0,6
x = 0,6 * 15
x = 9