Tìm x, biết: a) |x| = 1/4 + 4/7 b) |x-1| = 7/2 + -4/-3
Giải thích
a) x=14+47⇔x=1.7+4.428=2328⇔x=−2328x=2328
b) x−1=72+−4−3⇔x−1=296⇔x−1=296x−1=−296⇔x=356x=−236
a) x=14+47⇔x=1.7+4.428=2328⇔x=−2328x=2328
b) x−1=72+−4−3⇔x−1=296⇔x−1=296x−1=−296⇔x=356x=−236