$2x + 7 = 9x + 5$

$2x - 7 = 2x + 7 - 5$

$3x + 7 = -5 + x = 0$

$2x + 10$

$2x + 10 = 0$

$3x + 7 = 10 - x$

$3x - 4x = 7 - 19$

$5x - 6 = 13 - 7$

$2x + 7 = 14 - 9$

$-7 - 15x + 3x = -3x$

$7 + 20x = 9 - x$

$3x + 7x = 9 + 12$