Question

outra parte me ajudem!!

Answer 1

Ola!

m) 4. ( x+3 ) = 2. ( 1-x )
4x + 12 = 2 - 2x
4x + 2x = 2 - 12
6x = - 10
x = -10/6 ( simplifique por 2 )
x = -5/3

n) 2. ( 1-x ) = 3. ( 1+x )
2 - 2x = 3 + 3x
- 2x - 3x = 3 - 2
- 5x = 1 . (-1)
5x = - 1
x = - 1/5

o) - 7. ( 2+y) - ( y - 1 ) = 6
- 14 - 7y - y + 1 = 6
- 14 - 8y + 1 = 6
- 8y - 13 = 6
- 8y = 6 + 13
- 8y = 19 . (-1)
8y = - 19
y = - 19/8

p) 5. ( x+2 ) + 2. ( x-1 ) = 15
5x + 10 + 2x - 2 = 15
7x + 8 = 15
7x = 15 - 8
7x = 7
x = 7/7
x = 1

q) - 6. ( 1-x ) + 2x = x
- 6 + 6x + 2x = x
- 6 + 8x = x
8x - x = 6
7x = 6
x = 6/7

r) 5. ( x+4) + 3. ( 1-x ) = 0
5x + 20 + 3 - 3x = 0
2x + 23 = 0
2x = - 23
x = - 23/2

s) - 9. ( 2-x ) + 3. ( 1-x ) = x
- 18 + 9x + 3 - 3x = x
- 15 + 6x = x
6x - x = 15
5x = 15
x = 15/5
x = 3

t) 4. ( x-2 ) + ( x-1 ) = 7
4x - 8 + x - 1 = 7
5x - 9 = 7
5x = 7 + 9
5x = 16
x = 16/5


u) - ( x+4 ) - 2. ( 1+x ) = x
- x - 4 - 2 - 2x = x
- 3x - 6 = x
- 3x - x = 6
- 4x = 6 . (-1)
4x = - 6
x = - 6/4 ( simplifique por 2 )
x = - 3/2

v) 4. ( 2x-1 ) = 3. ( 1-2x )
8x - 4 = 3 - 6x
8x + 6x = 3 + 4
14x = 7
x = 7/14 ( simplifique por 7 )
x = 1/2

w) 2. ( 1+2x ) = 3. ( 1-x )
2 + 4x = 3 - 3x
4x + 3x = 3 - 2
7x = 1
x = 1/7

x) 5. ( 1+2x ) - 2. ( x+1 ) = - 5
5 + 10x - 2x - 2 = - 5
3 + 8x = - 5
8x = - 5 - 3
8x = - 8
x = - 8/8
x = - 1

Espero ter ajudado. Bons estudos!!