Question

4x -4 -5x = -6 + 90.

Answer 1

4x -4 -5x = -6 + 90

4x - 5x = -6 + 90 + 4

-x = 86

x = -86

Answer 2

$4x - 4 - 5x = - 6 + 90$
$- x - 4 = 84$
$- x = 84 + 4$
$- \times = 88$
$x = - 88$