Question

a) $\frac{2x}{5}$-33= 21

b)$b)\frac{3x}{7} +8 =24 C)$$\frac{3x}{x-3} -8 = 4$

d)$\frac{3x}{x-3} -2= -4$

e)$d) \frac{7x}{3} -5 =8 x+9$

Answer 1

Resposta:

Explicação passo-a-passo:

a)

2x /5 -33 =21

2x - 165 = 105

2x = 270

x = 135

b)3x/7 + 8 = 24

3x + 56 = 168

3x = 112

x = 112/3

c)3x/x-3 - 8 = 4

3x - 8x + 24 = 4x - 12

24 + 12 =  9x

9x = 36

x = 36/9

x = 4

d) 3x/x-3 - 2 = -4

3x - 2(x-3) = -4(x-3)

3x - 2x + 6 = -4x + 12

x + 4x = 12 - 6

5x = 6

x= 6/5

e) 7x/3 - 5 = 8x + 9

7x - 5*3 = 8x*3 + 9*3

7x - 15 = 24x + 27

-15 - 27 = 24x - 7x

17x = -42

x = -42/17