Question

help ayudaaaaaaaaaaaaa​

Answer 1

Explicación paso a paso:

a)

$5x + 2 = x + 10 \\ 5x - x = 10 - 2 \\ 4x = 8 \\ x = \frac{8}{4} \\ x = 2$

b)

$1 + 3x = 2x + 7 \\ 3x - 2x = 7 - 1 \\ x = 6$

c)

$2 + 7x = 4 + 5x \\ 7x - 5x = 4 - 2 \\ 2x = 2 \\ x = \frac{2}{2} \\ x = 1$

d)

$x - 18 = 2x - 3 \\ 3 - 18 = 2x - x \\ - 15 = x$

e)

$- 5 - 2x = 3 - 8x - 2 \\ - 5 - 2x = 1 - 8x \\ 8x - 2x = 1 + 5 \\ 6x = 6 \\ x = 1$

f)

$3(x - 7) = 5(x - 1) - 4 \\ 3x - 21 = 5x - 5 - 4 \\ 3x - 21 = 5x - 9 \\ - 21 + 9 = 5x - 3x \\ - 12 = 2x \\ - \frac{ 12}{2} = x \\ - 6 = x$

g)

$5(2 - x) + 3(x + 6) = 10 - 4(6 + 2x) \\ 10 - 5x + 3x + 18 = 10 - 24 - 8x \\ - 2x + 28 = - 14 - 8x \\ 8x - 2x = - 14 - 28 \\ 6x = - 42 \\ x = - \frac{42}{6} = \\ x = - 7$

h)

$3x + 8 - 5x - 5 = 2(x + 6) - 7x \\ - 2x + 3 = 2x + 12 - 7x \\ - 2x + 3 = - 5x + 12 \\ 5x - 2x = 12 - 3 \\ 3x = 9 \\ x = \frac{9}{3} \\ x = 3$

i)

$10(x - 2) = 10 \\ 10x - 20 = 10 \\ 10x = 10 + 20 \\ 10x = 30 \\ x = \frac{30}{10} \\ x = 3$

j)

$5 - (4x + 6) = 4x + (7 - 4x) \\ 5 - 4x - 6 = 4x + 7 - 4x \\ - 4x - 1 = 7 \\ - 4x = 7 + 1 \\ - 4x = 8 \\ x = - \frac{8}{4} \\ x = -2$

1). (-1)J=P-30

-J= -P+30

4J= P

-------------------------

3J=30

J=30/3=10

4(10)=P

40=P

Javier tiene 10 años

Su padre 40

2). 2L+25= 51

2L=51-25

2L= 26

L= 26/2

L= 13

3). 6-x=4(x-3)-7(x-4)

6-x= 4x-12-7x+28

7x-4x-x= -12+28-6

2x=10

x=10/2

x= 5

4). 2(3x-2)-(x+3)=8

6x-4-x-3=8

5x= 8+4+3

5x= 15

x=15/5

x=3