Ответ:
1.
а)2x-(x-5)-4x+7=2x-x+5-4x+7=-3x+12
б)4х+2(х-5)-6х=4х+2х-10-6х=-10
в)-4(х-8)-6х+10(х-1,2)=-4х+32-6х+10х-12=30
г)9(x - 1) - (5x - 2(х+1/2))=9х-9-5х+2х+1=6х-8
2. если х=1, то
8х-12=8×1-12=-4
-х-3=-1-3=-4
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Answers & Comments
Ответ:
1.
а)2x-(x-5)-4x+7=2x-x+5-4x+7=-3x+12
б)4х+2(х-5)-6х=4х+2х-10-6х=-10
в)-4(х-8)-6х+10(х-1,2)=-4х+32-6х+10х-12=30
г)9(x - 1) - (5x - 2(х+1/2))=9х-9-5х+2х+1=6х-8
2. если х=1, то
8х-12=8×1-12=-4
-х-3=-1-3=-4