Question

sig. ecuaciones porfas
a) x+x+10=40
b) 20+x+x+10+x=57
c) 3x-16=20
d) 2x+8-42
e) 2x+x+6x=18.000
f) 2.(x+3)+4x=18
g) x+10=2(x-4)
h) x+12+x+7+x=103
i) x+2.(x+1)=44

Answer 1

a)= 2x=40-10
2x=30
x=30:2
x=15

b)3x=57-20-10
3x=27
x=27÷3
x=9


c)3x=20+16
3x=36
x=36÷3
x=12



d)2x=34
x=17

e)9x=18000
x=18000÷9
x=2000

f)2x+6+4x=18
6x =18-6
6x =12
x =12÷6
x = 2


g) x+10=2x-4
x-2x =-4-10
-1x =-14
x = -14÷-1
x=-14


H)3x=103-12-7
3x=84
x=84÷3
x=28

I)x+2x+1=44
3x =44-1
3x =43
no da exacto

Answer 2

a)
$x + x + 10 = 40 \\ 2x + 10 = 40 \\ 2x = 40 - 10 \\ 2x = 30 \\ x = 30 \div 2 \\ x = 15$

b)
$20 + x + x + 10 + x = 57 \\ 3x + 30 = 57 \\ 3x = 57 - 37 \\ 3x = 27 \\ x = 27 \div 3 \\ x = 9$

c)
$3x - 16 = 20 \\ 3x = 20 + 16 \\ 3x = 36 \\ x = 36 \div 3 \\ x = 12$
d)

$2x + 8 = 42 \\ 2x = 42 - 8 \\ 2x = 34 \\ x = 34 \div 2 \\ x = 17$
e)
$2x + x + 6x = 18.000 \\ 9x = 18.000 \\ x = 18.000 \div 9 \\ x = 2000$

f)
$2 \times (x + 3) + 4x = 18 \\ 2x + 6 + 4x = 18 \\ 6x + 6 = 18 \\ 6x = 18 - 6 \\ 6x = 12 \\ x = 12 \div 6 \\ x = 2$
g)
$x +10 = 2(x - 4) \\ x + 10 = 2x - 8 \\ x - 2x = - 8 - 10 \\ - 1x = - 18 \\x = - 18 \div ( - 1) \\ x = 18$

h)

$x + 12 + x + 7 + x = 103 \\ 3x + 19 = 103 \\ 3x = 103 - 19 \\ 3x = 84 \\ x = 8 4 \div 3 \\ x = 28$

i)
$x + 2(x + 1) = 144 \\ x + 2x + 2 = 144 \\ 3x + 2 = 144 \\ 3x = 144 - 2 \\ 3x = 142 \\ x = \frac{142}{3}$

espero haberte ayudado