Respostas

  • Usuário do Brainly
2014-08-17T16:37:09-03:00
Pode multiplicar todas cruzado

a)
 \frac{x}{2}= \frac{5}{2}

2x=10
x=10÷2
x=5
S={5}

b)
 \frac{2x}{3} = \frac{1}{2}

4x=3

x= \frac{3}{4}

S={ \frac{3}{4} }


c)
 \frac{3x}{2} = \frac{1}{5}

15x=2

x= \frac{2}{15}

S={  \frac{2}{15} }

d)
 \frac{x}{3} =-2

x=-6

S={-6}

e)

x+ \frac{x}{5} =12

 \frac{5x+x}{5} =12

 \frac{6x}{5} =12

6x=60
x=60÷6
x=10
S={10}