a: =>x+24=49
=>x=25
b: =>x-100=-205+34
=>x=-105+34=-71
c: =>x+300=-52
=>x=-352
d: =>x+25=27-46=-19
=>x=-44
a)
38 -(x+24) = -11
x+24=38-(-11)
x+24=38+11
x+24=49
x=49-24
x=25
b)
-34+[x-100]=-205
x-100=-205-(-34)
x-100=-205+34
x-100=-171
x=-171+100
x=-71
48-[x+300]=100
x+300=48-100
x+300=-52
x=-52-300
=-352
d,[x+25]+46=27
x+25=27-46
x+25=-19
x=-19-25
x=-44