Предмет: Алгебра,
автор: SuperSultik11
Решите уравнение!
НАЧИНАЯ С №648
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Ответы
Автор ответа:
2
648. -7- 2(5x-6) = -2
-7- 10x + 12 = -2
-10x = -2 + 7 - 12
-10x = -7
x = -7/(-10)
x = 0,7
649. -2 = -9 - 2(-2x+1)
-2 = -9 + 4x - 2
-2 + 9 + 2 = 4x
9 = 4x
x = 9/4
x = 2,25
650. 10 - 2(-x - 7) = 9
10 + 2x + 14 = 9
2x = 9 - 14 - 10
2x = 15
x = 15/2
x = 7,5
651. 8 - 4(-7x + 8) = 4
8 + 28x - 32 = 4
28x = 4 - 8 + 32
28x = 28
x = 1
652. 1 - 6(2x - 3) = -2
1 - 12x + 18 = -2
-12x = -2 - 1 - 18
-12x = -21
x = -21/-12
x = 1,75
653. 10 + 9(-10-9x) = 8-x
10 - 90 - 81x = 8 - x
-81x + x = 8 - 10 + 90
-80x = -72
x = -72/-80
x = 0,9
654. -1 + 8(7-6x) = 2x + 6
-1 + 56 - 48x = 2x + 6
-48x - 2x = 6 + 1 - 56
-50x = -49
x = -49/-50
x = 0,98
655. -2 + 3(1 + 2x) = -2x + 3
-2 + 3 + 6x = -2x + 3
6x + 2x = 3 + 2 -3
8x = 2
x = 2/8
x = 0,25
656. -3x + 4 = -10 + 5(-7 - x)
-3x + 4 = -10 -35 - 5x
-3x + 5x = -10 - 35 + 4
2x = -41
x = -41/2
x = 20,5
657. 3x - 10 = 2 + 6(5 + 4x)
3x - 10 = 2 + 30 + 24x
3x - 24x = 2 + 30 + 10
-21x = 42
x = -2
658. 5x - 4 = 4 - 3(5 - 2x)
5x - 4 = 4 -15 + 6x
5x - 6x = 4 - 15 + 4
-x = -7
x = 7
659. 4 - 2(5 + 4x) = -x + 1
4 - 10 - 8x = -x + 1
-8x + x = 1 - 4 + 10
-7x = 7
x = -1
660. 10 - 3(1 - 7x) = -4x - 8
10 - 3 + 21x = -4x -8
21x + 4x = -8 - 10 + 3
25x = -15
x = -6
661. -1 - 4(-7 + 8x) = -2x - 6
-1 + 28 - 32x = -2x - 6
-32x + 2x = -6 + 1 - 28
-30x = -33
x = 1,1
662. 5(5 + 3x) - 10x = 8
25 + 15x - 10x = 8
5x = 8- 25
5x = -17
x = - 3,4
663. 4(7 + x) - 3x = 7
21 + 4x - 3x = 7
x = 7 - 21
x = -14
664. 7(-5 + 3x) + 4x = 9
-35 + 21x + 4x = 9
25x = 9 + 35
25x = 44
x = 1,76
-7- 10x + 12 = -2
-10x = -2 + 7 - 12
-10x = -7
x = -7/(-10)
x = 0,7
649. -2 = -9 - 2(-2x+1)
-2 = -9 + 4x - 2
-2 + 9 + 2 = 4x
9 = 4x
x = 9/4
x = 2,25
650. 10 - 2(-x - 7) = 9
10 + 2x + 14 = 9
2x = 9 - 14 - 10
2x = 15
x = 15/2
x = 7,5
651. 8 - 4(-7x + 8) = 4
8 + 28x - 32 = 4
28x = 4 - 8 + 32
28x = 28
x = 1
652. 1 - 6(2x - 3) = -2
1 - 12x + 18 = -2
-12x = -2 - 1 - 18
-12x = -21
x = -21/-12
x = 1,75
653. 10 + 9(-10-9x) = 8-x
10 - 90 - 81x = 8 - x
-81x + x = 8 - 10 + 90
-80x = -72
x = -72/-80
x = 0,9
654. -1 + 8(7-6x) = 2x + 6
-1 + 56 - 48x = 2x + 6
-48x - 2x = 6 + 1 - 56
-50x = -49
x = -49/-50
x = 0,98
655. -2 + 3(1 + 2x) = -2x + 3
-2 + 3 + 6x = -2x + 3
6x + 2x = 3 + 2 -3
8x = 2
x = 2/8
x = 0,25
656. -3x + 4 = -10 + 5(-7 - x)
-3x + 4 = -10 -35 - 5x
-3x + 5x = -10 - 35 + 4
2x = -41
x = -41/2
x = 20,5
657. 3x - 10 = 2 + 6(5 + 4x)
3x - 10 = 2 + 30 + 24x
3x - 24x = 2 + 30 + 10
-21x = 42
x = -2
658. 5x - 4 = 4 - 3(5 - 2x)
5x - 4 = 4 -15 + 6x
5x - 6x = 4 - 15 + 4
-x = -7
x = 7
659. 4 - 2(5 + 4x) = -x + 1
4 - 10 - 8x = -x + 1
-8x + x = 1 - 4 + 10
-7x = 7
x = -1
660. 10 - 3(1 - 7x) = -4x - 8
10 - 3 + 21x = -4x -8
21x + 4x = -8 - 10 + 3
25x = -15
x = -6
661. -1 - 4(-7 + 8x) = -2x - 6
-1 + 28 - 32x = -2x - 6
-32x + 2x = -6 + 1 - 28
-30x = -33
x = 1,1
662. 5(5 + 3x) - 10x = 8
25 + 15x - 10x = 8
5x = 8- 25
5x = -17
x = - 3,4
663. 4(7 + x) - 3x = 7
21 + 4x - 3x = 7
x = 7 - 21
x = -14
664. 7(-5 + 3x) + 4x = 9
-35 + 21x + 4x = 9
25x = 9 + 35
25x = 44
x = 1,76
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