Question

1. Resolva:
a) 7x + 30 = 2x - 70
b) 5x + 90 = 2x - 70
c) 4x + 30 = x - 700
d) 9x + 30 = 2x - 70
e) 7x + 70 = 2x - 70
f) 7x + 40 = 2x - 70
g) 7x + 30 = 3x - 70
h) 7x + 30 = 6x - 70
ME AJUDA POR FAVOR​

Answer 1

Resposta: Olá!

Explicação passo-a-passo:

a) 7x + 30 = 2x - 70

   7x - 2x = -70 - 30

    5x =-100

   x = - 100/5

    x = -20

b) 5x + 90 = 2x - 70

   5x - 2x = -70 - 90

    3x = -160

    x = -160/3

    x = -53,333...

c) 4x+ 30 = x - 700

   4x - x = - 700 - 30

     3x = -730

      x = -730/3

     x = -265

d) 9x + 30 = 2x -70

    9x - 2x = -70 -30

     7x = -100

    x = -100/7

e) 7x + 70 = 2x - 70

    7x -2x = -70 -70

    5x = -140

     x = -140/5

     x = - 28

f) 7x + 40 = 2x -70

    7x -2x = -70 - 40

    5x = -110

    x = -110/5

    x = - 22

g) 7x + 30 = 3x -70

    7x - 3x = -70 -30

   4x = -100

   x = -100/4

  x = - 25

h) 7x + 30 = 6x - 70

   7x - 6x = -70 -30

     x = -100

Bons estudos!

Answer 2

$a)7x + 30 = 2x - 70$

$7x - 2x = - 70 - 30$

$5x = - 100$

$x = - \frac{100}{5}$

$\boxed{ x = - 20}$

______________________________________

$b)5x + 90 = 2x - 70$

$5x - 2x = - 70 - 90$

$3x = - 160$

$\boxed{ x = - \frac{160}{3} }$

______________________________________

$c)4x + 30 = x - 700$

$4x - x = - 700 - 30$

$3x = - 730$

$\boxed{ x = - \frac{730}{3} }$

______________________________________

$d)9x + 30 = 2x - 70$

$9x - 2x = - 70 - 30$

$7x = - 100$

$\boxed{ x = - \frac{100}{7} }$

______________________________________

$e)7x + 70 = 2x - 70$

$7x - 2x = - 70 - 70$

$5x = - 140$

$x = - \frac{140}{5}$

$\boxed{ x = - 28}$

______________________________________

$f)7x + 40 = 2x - 70$

$7x - 2x = - 70 - 40$

$5x = - 110$

$x = - \frac{110}{5}$

$\boxed{ x = - 22}$

______________________________________

$g)7x + 30 = 3x - 70$

$7x - 3x = - 70 - 30$

$4x = - 100$

$x = - \frac{100}{4}$

$\boxed{ x = - 25}$

______________________________________

$h)7x + 30 = 6x - 70$

$7x - 6x = - 70 - 30$

$\boxed{ x = - 100}$

______________________________________

Att, IzabelaCristina2006 ❤️