x.600 + x.800 - 100 = 3300
x . ( 600 + 800 ) - 100 = 3300
x . 1400 - 100 = 3300
x . 1400 = 3300 + 100
x . 1400 = 3400
x = 3400 : 1400
x = ...
x . 600 + x . 800 - 100 = 3300
x . ( 600 + 800 ) - 100 = 3300
x . 1400 - 100 = 3300
x . 1400 = 3300 + 100
x . 1400 = 3400
x = 3400 : 1400
x = \(\frac{17}{7}\)
x.600 + x.800 - 100 = 3300
x.( 800 + 600 ) - 100 = 3300
x.1400 - 100 = 3300
x.1400 = 3300 + 100
x.1400 = 3400
x = 3400 : 1400