Absolute value inequality with two unknows: x and y

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I have a problem that kept me all day and I can't see the solution. I'm in 10th Class, so if you can solve with easy steps, it will be very useful for me. So the exercise is: $|x+1|+|y-2x|≤4$ https://drive.google.com/file/d/1I_HePaJiHDO1ziLW8cN6q_DCtFXz4zkW/view?usp=drivesdk