Bài 1 Tìm x
a) 3,2.x +(1,2).x+2,7= -4,9
b) (-5,6).x+2,9.x-3,86= -9,8
Bài 2
A = \(-5,13:\left(\frac{145}{28}-\frac{17}{9}.1,25+1\frac{16}{63}\right)\)
B= \(\left(3\frac{1}{3}.1,9+19,5:4\frac{1}{3}\right).\left(\frac{62}{75}-\frac{4}{25}\right)\)
giuk mik tickcho nhé