Question

va rog ajutatima dau coroana si 40 puncte
-(x-3)≥-(7+6)
-5(6,3x-2)≤ -7(x-2)
5(-2x+7)>-(x-8)
-3(x-2)≥(x-1)·3
va rog

Answer 1

-(x-3)≥-(7+6) ⇒-x+3≥-13 ⇒-x≥-16 ⇒x≤16

-5(6,3x-2)≤ -7(x-2) ⇒-5(x*63/10-2)≤-7x+14 ⇒-x*63/2+10≤-7x+14
-63x+20≤-14x+28 ⇒20-28≤63x-14x ⇒-8≤49x ⇒x≥-8/49

5(-2x+7)>-(x-8) ⇒-10x-35>-x+8 ⇒-35-8>-x+10x ⇒-43>9x ⇒-43/9>x

-3(x-2)≥(x-1)·3 ⇒ -3x+6≥3x-3 ⇒ 6+3≥6x ⇒9≥6x ⇒x≤9/6 ⇒x≤3/2