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
