Question

GENTE ME AJUDEM PFVRR!!
A) 7x-1=13
B) -x-2x-4=11
C) 3(x+2)=15
D)7(x-2)=6 (x+3)
E) 2(x.5)+4(x-1)=0

Answer 1

A) 7X - 1 = 13
7X = 13 + 1
7X = 14
X = 7

B) -X - 2X - 4 = 11
*multiplica por (-1)
X + 2X + 4 = -11
3X = -7
X = -7/3
Aproximadamente 2,3

C) 3 (x + 2) = 15
3X + 6 = 15
3X = 9
X = 3

D) 7 (x-2) = 6 (x+3)
7x - 14 = 6x + 18
7x - 6x = 18 + 14
X = 32

Answer 2

A)
7x - 1 = 13
7x = 13 + 17x = 14
x = 14/7
x = 2

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B)
- x - 2x - 4 = 11
- 3x = 11 + 4
- 3x = 15 ( - 1)
3x = - 15
x = - 15/3
x = - 5

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C)
3(x + 2) = 15
3x + 6 = 15
3x = 15 - 6
3x = 9
x = 9/3
x = 3
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D)
7.(x - 2) = 6.(x + 3)
7x - 14 = 6x + 18
7x - 6x = 18 + 14

x = 32

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E)
2.(x + 5) + 4(x - 1) = 0
2x + 10 + 4x - 4 = 0
2x + 4x + 10 - 4 = 0
6x + 6 = 0
6x = - 6
x = - 6/6
x = - 1