Question

resolva as equações
20_2(x+1)=x-4
21_3(x-3)=2x+1
22_x/3=2/3
24_x/4=1/3
25_1/3=x
26_4/5=2/x
27_5x/3=1/2​

Answer 1

Resposta:

20) 2x + 2 = x - 4

2x - x = - 4 - 2

x = - 6

21) 3x - 9 = 2x + 1

3x - 2x = 1 + 9

x = 10

22) \frac{x}{3}  = \frac{2}{3} \\

3x = 6

x = 2

24) \frac{x}{4}  = \frac{1}{3} \\

3x = 4

x = 4/3

25) x = 1/3

26) 4x = 10

x = 10/4

x = 5/2

27) 10x = 3

x = 3/10

Explicação passo-a-passo: