Ответ:
1.48x-56-17x=31x-56
2.9y-75+5y=14y-75
3.2.4x-1.7+2.1x-10,5=4.5x-11.2
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Ответ:
1.48x-56-17x=31x-56
2.9y-75+5y=14y-75
3.2.4x-1.7+2.1x-10,5=4.5x-11.2