Question

Помогите пожалуйста
Найдите корень уравнения
a) 2/5x-10
d) 10 - 0.3x - 1
c) 5 + 4x=x-1

Answer 1

$a) frac{2}{5}x - 10 = 0\ 2x - 50 = 0\2x = 50 \x =25\b) 10 - 0,3x - 1 = 0\9 - 0,3x = 0\-0,3x = -9\x=30\c) 5 + 4x = x -1\4x - x = -1 - 5\3x = -6\x = -2$