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Aflati pe x din egalitatile:
x+3supra8=8supra8;
8supra9-x=1supra9;
x+1supra9=1;
6supra7-x=1supra7.
Va rog!


Răspuns :

a)x+3/8=8/8⇒8(x+3)=64⇒8x+24=64⇒8x=64-24⇒8x=40⇒x=40/8⇒x=5
b)8/9-x=1/9⇒1(9-x)=72⇒9-x=72⇒-x=72-9⇒-x=63
c)x+1/9=1⇒x+1=9⇒x=8
d)6/7-x=1/7⇒7-x=42⇒-x=42/7⇒-x=6/-1=x=-6
sucees