Question

resolva as equações a)3x-1/5=4
b)x+9/9=1
c)4x+3/5=1
d)8x-5/2=9

Answer 1

a) 3x-1/5=4
mmc=5 sendo 5/5=1 e 5/1=5
3x-1=4.5
3x-1=20
3x=20+1
3x=21
x=21/3
x=7

b)x+9/9=1
mmc=9 sendo 9/9=1 e 9/1=9
x+9=1.9
x+9=9
x=9-9
x=0

c)4x+3/5=-1
mmc=5 sendo 5/5=1 e 5/1=5
4x+3=-1.5
4x+3=-5
4x=-5-3
4x=-8
x=-8/4
x= -2

d)8x-5/2=9
mmc=2 sendo 2/2=1 e 2/1=2
8x-5=9.2
8x-5=18
8x=18+5
8x=23
x=23/8

Answer 2

RExplicação passo a passo:

mmc=5 sendo 5/5=1 e 5/1=5

3x-1=4.5

3x-1=20

3x=20+1

3x=21

x=21/3

x=7

b)x+9/9=1

mmc=9 sendo 9/9=1 e 9/1=9

x+9=1.9

x+9=9

x=9-9

x=0

c)4x+3/5=-1

mmc=5 sendo 5/5=1 e 5/1=5

4x+3=-1.5

4x+3=-5

4x=-5-3

4x=-8

x=-8/4

x= -2

d)8x-5/2=9

mmc=2 sendo 2/2=1 e 2/1=2

8x-5=9.2

8x-5=18

8x=18+5

8x=23

x=23/8