Question

ayúdeme con esto por fa >:(​

Answer 1

Respuesta:

a) 3/5

b) 20/21

c) - 4/35

d) 3/4

Explicación paso a paso:

$a) \: - \frac{1}{5} + x = \frac{2}{5} \\ x = \frac{2}{5} + \frac{1}{5} \\ x = \frac{2 + 1}{5} \\ x = \frac{3}{5} \\ \\ b)x - \frac{2}{7} = \frac{2}{3} \\ x = \frac{2}{3} + \frac{2}{7} \\ x = \frac{14 + 6}{21} \\ x = \frac{20}{21} \\ \\ c) \frac{3}{5} - x = \frac{5}{7} \\ - x = \frac{5}{7} - \frac{3}{5} \\ - x = \frac{25 - 21}{35} \\ - x = \frac{4}{35} \: \: \times ( - 1) \\ x = - \frac{4}{35} \\ \\ d) - 0.5 + x = \frac{1}{4} \\ - \frac{1}{2} + x = \frac{1}{4} \\ x = \frac{1}{4} + \frac{1}{2} \\ x = \frac{2 + 4}{8} \\ x = \frac{6}{8} \: divide \: \div 2 \\ x = \frac{3}{4}$

Answer 2

Explicación paso a paso:

a) -1\5 + 2/5=2/5

b) 4/10 - 2\7=2\3