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(624-435)+(x+264)=688

Răspuns :

(624-435)+(x+264)=688
189+(x+264)=688
x+264=688-189
x+264=499
x=499-264
x=235



[tex](624-435)+(x+264)=688 \\ 189+x+264=688 \\ x=688-189-264 \\ x=235[/tex]