How can I balance (or eliminate) hot and cold spots in a photograph taken under mixed lighting?

I have recently purchased some high resolution color photographs of black and white drawings. It appears that they may have been taken near a window because the left side of the images are noticeably cooler than the right side. Can I change the temperature in selected areas of an image? If so how can I do this?

This is with just a masked Solid Color Layer set to Blend Mode Color, but you could also try Curves (which would allow to better control the color-change in relation to luminance), Photo Filter, etc.:

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