Tìm x, biết: a) x + 1/2 = -6/5 . 3/4 b) 2/5 + x = (-5)^2 . 3/5 c) x - 17/36

a)x+12=−65.34x+12=−910x=−910−12x=−75     

b)25+x=−52.3525+x=15x=735

c)x−1736=−1516.427x−1736=−536x=−536+1736x=13