Ответ:
3х=30, х=10
51х=39×17; 51х=663; х=13
-12х=32×18; -12х=576: х= -48
х=16×25; х=400
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Ответ:
3х=30, х=10
51х=39×17; 51х=663; х=13
-12х=32×18; -12х=576: х= -48
х=16×25; х=400