Răspuns :
a)5x=-10
x=-10:5
x=-2
b) -3x=3^2
-3x=9
x=9:(-3)
x=-3
c)-6x=-2×3^2
-6x=-2×9
-6x=-18
x=-18:(-6)
x=3
d)-2^2×7^3=7^2×1
-4×21=49×1
-84=49
-84-49=-133
e)-2^2×3=-6x
-4×3=-6x
-12=-6x
x=-12:(-6)
x=2
f)(2+3)x=-15
5x=-15
x=-15:5
x=-3
g)(79-84)x=-10
-5x=-10
x=-10:(-5)
x=2