Question

Va rog este urgent dau coroana

Answer 1

Răspuns:

a)x+7= -1 b)x-7=13 c)3x=18 d)-5x=20

x=-1-7 x=13+7 x=18/3 x=20/-5

x= -8 x=20 x=6 x= -4

e)x:7= -4 f)28:x= -7 g)2x+9=5 h)4x-9=-13

x=7×(-4) x=28/-7 2x=5-9 4x=-13+9

x=-28 x=-4 2x=-4 4x=-4

x=-4/2 x=-4/4

x=-2 x=-1

i)|x-5|=2 rezulta x-5=2 sau x-5= -2

x=2+5 x=-2+5

x=7 x=3

j)x+[|-12|:2²+1]³=-14

x+(12:4+1)³= -14

x+(3+1)³=-14

x+4³=-14

x+64=-14

x=-14-64

x=-78