Question

2(x-0,4)=1 $\frac{1}{6}$ x- 5

Answer 1

$2(x-0.4)=1\dfrac16x-5\\\\2x-0,8=\dfrac76x-5\\\\2x-\dfrac76x=-5+0.8\\\\12x-7x=-30+4.8\\\\5x=-25.2\\\\x=-\dfrac{25.2}5\\\\x=-5.04$

Проверка:

$2(-5.04-0.4)=1\dfrac16(-5.04)-5\\\\ {}\ \ \ \ \ \ \ \ \ -10.88=-10.88$

$2(-5.04-0.4)=1\dfrac16(-5.04)-5\\\\2(-5.44)=-\dfrac{35.28}{6}-5\\\\-10.88=-5.88-5\\\\-10.88=-10.88$