Question

A) 1/4 ×+ 1/5 ×+ 1/2 × =40

B 1/4 + 1/5 + 1/2 + 40=×

C) 1/4 × 1/5 ×- 1/2 ×=×

????​

Answer 1

Resposta:

a) $x = \frac{800}{19}$

b) $x = \frac{819}{20}$

c) $x = 0$

Explicação passo-a-passo:

a) $\frac{1}{4} x + \frac{1}{5} x + \frac{1}{2} x = 40$

   $5x + 4x + 10x = 800$

   $19x = 800$

    $x = \frac{800}{19}$

b) $\frac{1}{4} + \frac{1}{5}+ \frac{1}{2} + 40 = x$

    $\frac{819}{20} = x$

    $x = \frac{819}{20}$

c) $\frac{1}{4} x \frac{1}{5}x - \frac{1}{2} x = x$

   $\frac{1}{20}x - \frac{1}{2}x = x$

   $x - 10x = 20x$

  $-9x = 20x$

  $-9x - 20x = 0$

  $- 29x = 0$

   $x = 0$