How to achieve this layout using CSS

So I am in a container with max-width of 1200px and in the container I have a flex parent with two child and I want the right child to be at the edge of screen like the (attached image), however the container is important because the other sections are within that container.
FireShot_Capture_155_-_Matbltd_Contact_Us_1.psd_-_Avocode_-_app.avocode.com.png
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