Question

01) Resolvas as equações abaixo:
a) x + 9x = 25 + 7 + 2x
b) 30x + 2x = + 12x + 20
c) 2x + 6x + 25 = 4x + 105
d) 18x + 6 = + 12x + 48
e) 3x – x – 20 = – 6x + 20
f) 16x – 2x – 8 = 7x + 12 + 8
g) 18x – 3x = 13x + 12
h) 9x – 4x – 7 = – 2x – 14
i) 2x – 15 = – 4x + 15​

Answer 1

Explicação passo-a-passo:

a)x+9x=25+7+2x

x+9x-2x=25+7

8x=32

x=32/8

x=4

b)30x+2x=12x+20

30x+2x-12x=20

20x=20

×=20/20

x=1

c)2x+6x+25=4x+105

2x+6x-4x=105-25

4x=80

x=80/4

x=20

d)18x+6=12x+48

18x+12×=48-6

30x=42

30x=42

x=42/30

×=1,4

e) 3x-x-20=-6x+20

3x-x+6x=20+20

8x=40

x=40/8

x=5

f)16x-2x-8=7x+12+8

16x-2x-7x=12+8+8

7x=28

x=28/7

x=4

g) 18x-3x=13x+12

18x-3x-13=12

2x=12

x=12/2

x=6

h) 9x- 4x-7=-2x-14

9x-4x+2x=-14+7

7x=-7

x=-7/7

x=-1

i) 2x-15=-4x+15

2x+4x=15+15

6x=30

x=30/6

x=5

Bons estudos