Question

1/5(10x-15)-2x=4 1/5 (5x+25)​

Answer 1

Ответ:

$x = - 5 \frac{1}{7}$

Объяснение:

$\frac{1}{5} \times 5(2x - 3) - 2x = \frac{21}{5} \times 5(x + 5)$

$(2x - 3) - 2x = 21(x + 5)$

$2x - 3 - 2x = 21x + 105$

$- 3 = 21x + 105$

$- 21x = 105 + 3$

$- 21x = 108$

$x = - \frac{36}{7} = - 5 \frac{1}{7}$

Answer 2

$\displaystyle\bf\\\frac{1}{5} (10x-15)-2x=4\frac{1}{5} (5x+25)\\\\\\\frac{1}{5} \cdot5\cdot(2x-3)-2x=\frac{21}{5} \cdot 5\cdot(x+5)\\\\\\2x-3-2x=21(x+5)\\\\\\-3=21x+105\\\\\\21x=-3-105\\\\\\21x=-108\\\\\\x=-5\frac{1}{7}$