Question

решить уравнения.$\frac{1}{5}x=5 \\\\2x-(6x+1)=9$

Answer 1

$\frac{1}{5} x = 5 \\ \\ 5 \frac{1}{5} x = 5 \times 5 \\ \\ x = 5 \times 5 \\ = 25 \\ \\ 2)2x - (6x + 1) = 9 \\ 2x - 6x - 1 = 9 \\ - 4x - 1 = 9 \\ - 4 x= 9 + 1 \\ - 4x = 10 \div - 4 \\ x = - 2.5$