Question

5 x -21 - 3X-1 = 0
Решите пожалуйста

Answer 1

$5x - 21 - 3x - 1 = 0 \\ 5x - 3x = 0 + 21 + 1 \\ 2x = 22 \\ x = 22 \div 2 \\ \boldsymbol{x = 11}$