Question

a) x-1=5-x/4

b) 2x-1/2=5x+1/3

c) x/2-7=x/4+5

Answer 1

a)

x-1=5-x/4

4x - 4 = 5 - x

4x + x = 5 + 4

5x = 9

x = 9/5

b)
2x-1/2=5x+1/3

3 ( 2x - 1 ) = 2 ( 5x + 1 )

6x - 3 = 10x + 2

6x - 10x = 2 + 3

- 4x = 5------>×(-1)

4x = - 5

x = - 5 /4

c)

x/2-7=x/4+5

x/-5 = x/ -1

x / -5 = - x

x = 5x

x - 5x = 0

- 4x = 0------>×(-1)

x = 0

Answer 2

x-1=5-x/4⇒ agora multiplica por 4

4x-4=5-x

4x+x=5+4

5x=9

x=1,8

2x-1/2=5x+1/3⇒faz o m.m.c. e ficará igual a seis

6x-3/6=10x+2/6⇒corta o seis

6x-3=10x+2

6x-10x=3+2

-4x=5

-x=1,25⇒o x não pode ficar negativo então multiplicamos todu por -1

x=-1,25

x/2-7=x/4+5

x/-5=x/9

-9x/45=5x/45

-9x=5x

-14x=0

-x=0(-1)

x=0