Question

3x-4(x+1) mai mic sau egal cu7,x€Z cat este x?

Answer 1

$3x - 4(x + 1) \\ 3x - 4x - 4 \\ - x - 4$
$- x - 4 \leqslant 7 \\ - x \leqslant 7 + 4 \\ - x \leqslant 11 \\ x \geqslant - 11$
=> x apartine multimii {-11 ; -10 ......}