Question

1. Resolva as equações a seguir, sendo U = Q.

a) 5x - 3 + x + 9

b) 17x - 7x = x + 18

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

d) 5x - 7 = 1/2 + x
2

e) x - 4 = -x + 49
3 2

f) 4x - 3 (2x + 1) = 8x + 1

Answer 1

Resposta:

a)5x -3+x=9

6x=9+3

6x=12

x=12/6

x=3

b)17x-7x=x+18

10x=x+18

10x-x=18

9x=18

x=18/9

x=2

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

x+2x=17+1+4

3x=22

x=22/3

d)5x-7=1/2+x+2

5x-x=1/2+2+7

4x=19/2

x=19/8

e)x-4=-x+49+32

x+x=49+32+4

2x=85

x=85/2

f)4x-3(2x+1)=8x+1

4x-6x-3=8x+1

-2x-3=8x+1

-2x-8x=1+3

-10x=4

x=-4/10÷ 2

x=-2/5

Explicação passo-a-passo: