Question

Resolva as equações abaixo:
a) 2x + 44 = x – 72
b) 12 - 21 + x – 2x = 3 +2x
c) -3x +29 = 12 +32
d) 2( x+4) = 3 (x – 15)
e) -5 (x – 1) = x + 11
f) 100 ( 2x +5 )= 200

Me ajudem!

Answer 1

Explicação passo-a-passo:

a) 2x + 4 = x -72

2x - x = -72 -4

x = -68

b) 12 -21 + x - 2x = 3 + 2x

x - 2x - 2x = 3 - 12 + 21

-3x = 12

x = 12/3

x = 4

c) -3x + 29 = 12 + 32

-3x = 12 + 32 - 29

-3x = 15

x = 15/3

x = 5

d) 2( x+4) = 3 (x – 15)

2x + 8 = 3x - 45

2x - 3x = -45 - 8

-x = -53

x = 53

e) -5 (x – 1) = x + 11

-5x - (-5) = x + 11

-5x - x = 11 +5

-6x = 16

x = 16/6

f) 100 ( 2x +5 )= 200

200x + 500 = 200

200x = 200 - 500

x = -300/200