Question

{-3×[19-(x-3)×(-4)]-8}÷(-5)=1

Answer 1

{-3×[19-(x-3)×(-4)]-8}:(-5)=1
-3×[19-(x-3)×(-4)]-8=1×(-5)
-3×[19-(x-3)×(-4)]-8=(-5)
-3×[19-(x-3)×(-4)]=(-5)+8
-3×[19-(x-3)×(-4)]=3
19-(x-3)×(-4)=3:(-3)
19-(x-3)×(-4)=(-1)
(x-3)×(-4)=19-(-1)
(x-3)×(-4)=19+1
(x-3)×(-4)=20
x-3=20:(-4)
x-3=(-5)
x=(-5)+3
x=-2