-4/7 - 5/14 × -39/25 + -1/42 : (-5/6)

Bài 1:
a)-4/7-5/14×-39/25+-1/42:(-5/6)
b)(4/5+-9/7)×2025/2030+(-5/7- -6/5)×2025/2030
Bài 2: Tìm x,biết
a)1/3x-2/5=-7/15
b)2x-3×3=2x+92-0
c)0,2-x=-1 2/5
d)x+3/2=-5/12
e)3×(-2x+5/2)×(x11)