Ответ:
0,5x + 1/7 +7,4 - 9/14x =(1/2x+1/7-9/14x)+7,4=(7/14x+2/14x-9/14x)+7,4=7,4
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Ответ:
0,5x + 1/7 +7,4 - 9/14x =(1/2x+1/7-9/14x)+7,4=(7/14x+2/14x-9/14x)+7,4=7,4