a) x=-20
b) x=50
Explicație pas cu pas:
a) -4-{6-[-3+(-3)-(x+5)-7]-9}=1
-4-[6-(-3-3-x-5-7)-9]=1
-4-[6-(-6-x-12)-9]=1
-4-[6-(-18-x)-9]=1
-4-(6+18+x-9)=1
-4-(24+x-9)=1
-4-(15+x)=1
-4-15-x=1
-19-x=1
-x=1+19
-x=20 |×(-1)
x=-20
b)-10{-2-2[(-4)⁵ ÷4⁴-2]}=-2x
-10{-2-2×[(-4)¹-2]}=-2x
-10[-2-2×(-4-2)=-2x
-10[-2-2×(-6)]=-2x
-10(-2+12)=-2x
-10×10=-2x
-100=-2x
-2x=-100 |÷(-2)
x=50