Question

Solucione as equações:
a)3x+2x+1=6

b)7x+5x=6

c)2x=x/2+24

d)4x=x/3+20

Answer 1

a)3x+2x+1=6
5x=6-1
5x=5
x=5/5
x=1

b)7x+5x=6
12x=6
x=6/12
x=0,5

c)2x=x/2+24
2x=0,5x+24
2x-0,5x=24
1,5x=24
x=24/1,5
x=16

d)4x=x/3+20(3)
12x=x+60
12x-x=60
11x=60
x=60/11

Answer 2

a  3x + 2x + 1 = 6

5x + 1 = 6

5x = 6 - 1

5x  = 5

x = 5/5        x =1

b  7x +5x + 6

12x = 6      x = 6/12

x = 1/2

c  2x = x/2 + 24

2x - x/2 = 24

4x -x  = 24 . 2

3x = 48        x = 48/3  x = 16

d 4x = x/3 + 20

4x - x/3 = 20

12x - x = 20 .3

x  = 60/11