Question

e)
$9x - 4x + 10 = 7x - 30$
f)
$4x + 10 = 45 - 3x$
g)
$12 - 7 + 4x = 25$
h)
$5x - 3 = 2x + 9$
me ajudar pfvr​

Answer 1

Resposta:

e) x = 20

f) x = 5

g) x = 5

h) x = 4

Explicação passo-a-passo:

e) $9x-4x+10=7x-30$

$5x+10=7x-30$

$5x-7x=-30-10$

$-2x=-40$

$x=\dfrac{-40}{-2}$

$x=20$

______

f) $4x+10=45-3x$

$4x+3x=45-10$

$7x=35$

$x=\dfrac{35}{7}$

$x=5$

_______

g) $12-7+4x=25$

$5+4x=25$

$4x=25-5$

$4x=20$

$x=\dfrac{20}{4}$

$x=5$

_______

h) $5x-3=2x+9$

$5x-2x=9+3$

$3x=12$

$x=\dfrac{12}{3}$

$x=4$

Answer 2

Explicação passo-a-passo:

e) 9x - 4x + 10= 7x - 30

5x + 10= 7x - 30

5x - 7x= -30 - 10

-2x= -40 ×(-1) em ambos os lados

2x= 40

x= 40/2

x= 20

f) 4x + 10= 45 - 3x

4x + 3x= 45 - 10

7x= 35

x= 35/7

x= 5

g) 12 - 7 + 4x= 25

5 + 4x= 25

4x= 25 - 5

4x= 20

x= 20/4

x= 5

h) 5x - 3= 2x + 9

5x - 2x= 9 + 3

3x= 12

x= 12/3

x= 4

Bons estudos...!!!