Question

x+1/3=1
x - 2/5=3/10
2/3 + x = 7/9
x +1/4 = 1/5
x - 1/2= -1/4
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Answer 1

Respuesta:

$x + \frac{1}{3} = 1 \\ 3(x + \frac{1}{3} ) = 1 \times 3 \\ 3x + 1 = 3 \\ 3x = 3 - 1 \\ 3x = 2 \\ x = \frac{2}{3}$

$x - \frac{2}{5} = \frac{3}{10} \\ 10(x - \frac{2}{5} ) = 10 \times \frac{3}{10} \\ 10x - 4 = 3 \\ 10 x= 3 + 4 \\ 10x = 7 \\ x = \frac{7}{10}$

$\frac{2}{3} + x = \frac{7}{9} \\ 9( \frac{2}{3} + x ) = 9 \times \frac{7}{9} \\ 6 + 9x = 7 \\ 9x = 7 - 6 \\ 9x = 1 \\ x = \frac{1}{9}$

$x + \frac{1}{4} = \frac{1}{5} \\ 20(x + \frac{1}{4} ) = 20 \times \frac{1}{5} \\ 20x + 5 = 4 \\ 20x = 4 - 5 \\ 20x = - 1 \\ x = - \frac{1}{20}$

$x - \frac{1}{2} = - \frac{1}{4} \\ 4(x - \frac{1}{2} ) = 4 \times ( - \frac{1}{4} ) \\ 4x - 2 = - 1 \\ 4x = - 1 + 2 \\ 4x = 1 \\ x = \frac{1}{4}$