Question

1- Resolva as equações em Z: a) 6x=2x+16 b) 2x-5=x+1 c) 2x+3=x+4 d) 5x+7=4x+10 e) 4x-10=2x+2 f) 4x-7=8x-2 g) 2x+1=4x-7 h) 9x+9+3x= 15. i) 16x-1=12x+3 i) 3x-2=4x+9 k) 5x-3+x=2x+9 o) 5x+6x-16=3x+2x-4 p) 5x+4=3x-2x+4 1) 17x-7x=x+18 m) x+x-4=17-2x+1 n) x+2x+3-5x=4x-9

Answer 1

Resposta:

eita kk, quanto número, mas bora lá

a) 6x = 2x + 16

6x - 2x = 16

4x = 16

x = 16 / 4 = 4

b) 2x - 5 = x + 1

2x - x = 5 + 1

x = 6

c) 2x + 3 = x + 4

2x - x = 4 - 3

x = 1

d) 5x + 7 = 4x + 10

5x - 4x = 10 - 7

x = 3

e) 4x - 10 = 2x + 2

4x - 2x = 10 + 2

2x = 12

x = 12/2 = 6

f) 4x - 7 = 8x - 2

2 - 7 = 8x - 4x

-5 = 4x

x = -5/4

g) 2x + 1 = 4x - 7

1 + 7 = 4x - 2x

8 = 2x

x = 8/2 = 4

h) 9x + 9 + 3x = 15

9x + 3x = 15 - 9

12x = 6

x = 6/12 = 0,5

i) 16x - 1 = 12x + 3

16x - 12x = 3 + 1

4x = 4

x = 4/4 = 1

j) 3x - 2 = 4x + 9

- 2 - 9 = 4x - 3x

-11 = x

k) 5x - 3 + x = 2x + 9

6x - 2x = 9 + 3

4x = 12

x = 12/4 = 3

l) 17x - 7x= x + 18

10x - x = 18

9x = 18

x = 18/2 = 9

m) x + x - 4 = 17 - 2x + 1

2x + 2x = 18 + 4

4x = 22

x = 22/4 = 5,5

n) x + 2x + 3 - 5x = 4x - 9

3 + 9 = 4x + 5x - 2x - x

12 = 6x

x = 12/6 = 2

p) 5x + 4 = 3x - 2x - 4

5x - 3x + 2x = -4 -4

4x = -8

x = -8/4 = -4

espero ter ajudado ☆