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Ответы
Ответ:
Пошаговое объяснение:
4(x - 2) = -5x
4x - 8 = -5x
5x + 4x = 8
9x = 8
x = 8:9
x = 8/9
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-(4x - 7) = -7x
-4x + 7 = -7x
7x - 4x = -7
3x = -7
x = -7 : 3
x = -2цел. 1/3
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-6(x - 1) = 13
-6x + 6 = 13
-6x = 13-6
-6x = 7
x = -7 : 6
x = -1цел. 1/6
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2(x + 1) = 9(x - 3)
2x + 2 = 9x - 27
9x - 2x = 2 + 27
7x = 29
x = 29 : 7
x = 4цел. 1/7
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3,2(2 - 3y)=3(0,8y-1)+3,4
6,4 - 9,6y = 2,4y - 3 + 3,4
6,4 - 9,6y = 2,4y + 0,4
2,4y+9,6y = 6,4 - 0,4
12y = 6
y = 6 : 12
y = 0,5
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3(0,4x + 7) - 4(0,8x - 3) = 2
1,2x + 21 - 3,2x + 12 = 2
-2x + 33 = 2
2x = 33 - 2
2x = 31
x = 31:2
x = 15,5
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0,77(8/11x - 3/7) - 4,5(7/15x + 2/9) = 1,75
77/100*(8/11x - 3/7) - 45/10*(7/15x + 2/9) = 1,75
14/25x - 33/100 - 21/10x - 1 = 1,75
28/50x - 1 33/100 - 105/50 = 1,75
-77/50x - 1 33/100 = 1,75
-77/50x = 1,75 + 1 33/100
-77/50x = 1 75/100 + 1 33/100
-77/50x = 2 108/100
x = 2 108/100 : (-77/50)
x = 308/100 * (-50/77)
x = -4/2 = -2