Question

Resouva as equações?
(a) 7X+5=54 (b) 3X+2X+1=6 (c) 7X+5X=60 (d) X+X+X=78 (e) 2X+3X+4=189 (f) 5X-4-3X=-16 (g) 5X+X-4=-28 (h) 8X-9-X=-9 quero com cauculos!!!

Answer 1

A)-7x+5=54

x=7-5=54

x=2=54

x=54/2

x=27

B)-3x+2x+1=6

5x+1=6

5x=1-6

5x=5

x=5/5

x=1

C)-7x+5x=60

12x=60

x=60/12

x=5

D)-x+x+x=78

X ao cubo=78

x=78/3

x=26

E)-2x+3x+4=189

5x+4=189

5x=4-189

5x=185

x=185/5

x=37

F)-5x-4-3x=-16

5x-3x=4-16

2x=12

x=12/2

x=6

G)-5x+x-4=-28

5x ao quadrado=4-28

5x ao quadrado=24

x ao quadrado=24/5

x ao quadrado=4.8

H)-8x-9-x=-9

8x-x=9-9

7x=0

x=7/0

x=0

Answer 2

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Ola Marcos

a) 7x + 5 = 54

7x = 49
x = 7

b) 3x + 2x + 1 = 6

5x = 5
x = 1

c) 7x + 5x = 60

12x = 60
x = 5

d)

x + x + x = 78
3x = 78
x = 26

e) 2x + 3x + 4 = 189

5x = 185
x = 37 

f) 5x - 4 - 3x = -16

2x = - 12
x = -6

g) 5x + x - 4 = -28

6x = -24
x = -4

h) 8x - 9 - x = -9

7x = 0
x = 0

pronto