Question

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Answer 1

8) 2x-3/2 = x+1/6

Mmc ( 2 e 6 )=6

3 ( 2x-3 )               ( x +1 )

——————-  =  —————-

       6                   6

6x-9= x+1

6x-x=+1+9

5x=10

x=10/5

x=2

Answer 2

6)

AB = 6cm

CD= 3cm

Razão:  $\frac{\textsf{AB}}{\textsf{CD}} = \frac{6}{3}=2$

7)

a) 3 e 15cm

Razão:  $\frac{\textsf{AB}}{\textsf{CD}} = \frac{3}{15}=\frac{1}{5}$

b) 21 e 7cm

Razão:  $\frac{\textsf{AB}}{\textsf{CD}} = \frac{21}{7}=3$

8)

$\frac{2x-3}{2} =\frac{x+1}{6}\\\\6(2x-3) =2(x+1)\\12x-18 =2x+2\\12x-2x=2+18\\10x=20\\x = 20\div10\\\\\boxed{x = 2}$