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a fost răspuns

4(x+8)-7(x-1)<12
4(x-1,5)-1,2>6
2(3-x)-3(2+x)

Răspuns :

Nitugheorghe57
a)4(x+8)-7(x-1)<12⇒4x+32-7x+7<12⇒-3x+39<12⇒-3x<-39+12⇒-3x<-27⇒
x<-27/-3⇒x<9
x∈{1.2.3.4.5.6.7.8.9}
4(x-1.5)-1.2>6⇒4x-6-1.2>6⇒4x-7.2>6⇒4x>7.2+6⇒4x>13.2⇒x>13.2/4⇒x>3.3
2(3-x)-3(2+x)=6-2x-6-3x⇒-5x+0⇒x=0/-5⇒x=0
sucees

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