X + 100 x 10 + 100 x 10 = 30
X +1000 + 1000 = 30
X + 2000 = 30
X = 30 - 2000
X = -1970
\(x+100\cdot10+100\cdot10=30\)
\(x+1000+1000=30\)
\(x+2000=30\)
\(x=30-2000\)
\(x=1970\)
x+1000+1000=30
x+2000=30
x=2000-30
x=1970
x + 100 x 10 + 100 x 10 = 30
x + 2000 = 30
x = 30 - 2000
x = - 1970
x + 2000 = 30
x = 30 - 2000
x = 1970