Question

Six is less than or equal to the sum of 4 and -2x

Answer 1

Equal to! When adding a negative and a posative the sum will always be a posative number. therefore you would just add as if the negative sign wasn't even there!

Answer 2

$6 \leq 4+(-2x) \\ \\ 6 \leq 4-2x \\ \\ 6-4 \leq -2x \\ 2 \leq -2x \\ -2x \geq 2 \\ x \leq -1$