Question

1) Determine x : com calculos : a) 5x - 3 + x = 2x + 9
b) 17x - 7x = x + 18
c) x + x - 4 = 17 - 2x + 1

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


e) 5x + 6x - 16 = 3x + 2x - 4

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

Answer 1

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

5x+x-2x=9+3

4x=12

x=3

b)17x-7x=x +18

10x-x=18

9x=18

x=2

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

x+x+2x=17+1+4

4x=22

x=22/4

x=11/2

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

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

-6x=-12

12=6x

2=x

e)5x+6x-16=3x+2x-4

5x+6x-3x-2x= -4+16

6x=12

x=2

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

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

4x=0

x=0