Verified Answer :

luana

\(180-x=10+2(90-x)\ \ \ \ \ |Omit\ the\ bracket\\\\ 180-x=10+180-2x\ \ \ |Add\ 2x\\\\ 180+x=190\ \ \ |Subtract\ 180\\\\ x=10\\\\Solution\ is\ x=10.\)

180 - x = 10 + 2(90-x)
180 - x = 10 + 180 - 2x
180 - x = 190 - 2x
180      = 190 -1x
-10       =  -1x

10 = x

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