Question

ajudem pelo amor… aaaaaaaaa

Answer 1

Resposta:

$a) \: \: \frac{2}{4} \times \frac{3}{x} = 2 \times = 12 \:$

$x = 12 \div 3 = 4$

$x = 4$

$b) \: \frac{4}{12} \times \frac{x}{21} = 12x = 84$

$x = 84 \div 12 = 7$

$x = 7$

C) x 8

----- × ----- = 12x = 72

9 12

x = 72 ÷ 12 = 6

x = 6

d) x-5 x+1

------ × ------ = 24(x-5) = 6(x+1)

6 24

24x-120 = 6x+6

24x-6x = 120+6

18x = 126

x = 126 ÷ 18 = 7

x = 7