1. Tìm x
a) \(2\frac{1}{3}\)+ ( x - \(\frac{3}{2}\)) = ( 3 - \(\frac{3}{2}\)) x
b) x + ( x + 1 ) + ( x + 2 ) + .... + ( x + 2018) = 2019
c) \(\frac{1}{3}\)+ x = \(\frac{1}{12}\)+ \(\frac{1}{20}\)+ \(\frac{1}{30}\)+ \(\frac{1}{42}\)+ \(\frac{1}{56}\)+ \(\frac{1}{72}\)+ \(\frac{1}{90}\)+ \(\frac{1}{110}\)
d) x + \(\frac{1}{13}\)- \(\frac{1}{15}\)- \(\frac{1}{35}\)- \(\frac{1}{63}\)- \(\frac{1}{99}\)- \(\frac{1}{143}\)= 2x + \(\frac{1}{2}\)
Giúp em vs!!!!!! >.<