Question

X/4-7/10=2X/5-1
????????? AJUDEEM

Answer 1

x/4-7/10=2x/4

5x/20-14/20=10x/20

5x-14=10x

-14=10x-5x

-14=5x

-14/5=x

-2,8=x

-14/5=x ou -2,8=x

Answer 2

$\frac{x}{4} - \frac{7}{10} = \frac{2x}{5} - 1$

vamos achar o mmc ( menor múltiplo comum)

$5x - 2 \times 7 = 4 \times 2x - 20 \\ 5x - 14 = 8x - 20 \\ 5x - 8x = - 20 + 14 \\ - 3x = - 6 \\ \\ x = \frac{6}{3} \\ x = 2$