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Lora31
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Ex 12 !!!!va rog !!cat mai repede

Ex 12 Va Rog Cat Mai Repede class=

Răspuns :

Nitugheorghe57
a)3x+5<3(x+2)⇒3x+5<3x+6⇒3x-3x<6-5⇒0<1

b)4x+7>2(2x+5)⇒4x+7>4x+10⇒4x-4x>10-7⇒0>3
 c)7x+41>2(3x+11)⇒7x+41>6x+22⇒7x-6x>-41+22⇒x>-19
d)18+10x<5(x+2)+2(x+3)⇒
18+10x<5x+10+2x+6⇒
18+10x<7x+16⇒10x-7x<-18+16⇒3x<-2⇒x<-2|3
succes

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