Question

Решите уравнения
-4(-x+7)=x+17
c-32=-7(c+8)
3(4x-8)=3x-6
5(x-7)=3(x-4)
4(x-3)-16=5(x-5)
8(2a-6)=2(4a+3)
-4(3-5x)=18x-7
6a+(3a-2)=14
8x-(7x-142)=51

Answer 1

- 4*( - x + 7 ) = x + 17 
4x - 28 = x + 17 
3x = 45 
x = 15 
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c - 32 = - 7 * ( c + 8 ) 
c - 32 = - 7c - 56
8c = - 24 
c = - 3 
------------------------------------
3 * ( 4x - 8 ) = 3x - 6 
12x - 24 = 3x - 6 
9x = 18 
x = 2 
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5 * ( x - 7 ) = 3 * ( x - 4 ) 
5x - 35 = 3x - 12 
2x = 23 
x = 11,5 
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4 * ( x - 3 ) - 16 = 5 * ( x - 5 ) 
4x - 12 - 16 = 5x - 25 
4x - 28 = 5x - 25 
x = - 3 
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8 * ( 2a - 6 ) = 2 * ( 4a + 3 ) 
16a - 48 = 8a + 6 
8a = 54 
a = 6,75 
-----------------------------------------------------
- 4 * ( 3 - 5x ) = 18x - 7 
- 12 + 20x = 18x - 7 
2x = 5 
x = 2,5 
--------------------------------------------------------
6a + ( 3a - 2 ) = 14 
6a + 3a - 2 = 14 
9a = 16 
a = 1 ( 7/9 )
-------------------------------------------------------
8x - ( 7x - 142 ) = 51 
8x - 7x + 142 = 51 
x = - 91

Answer 2

спасибо большое

Answer 3

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