Question

[kookie Le]

tìm x, biết

a) 2480 - 4710 : 3 + [ 200 - ( x - 5 ) ] = 1010

b) 0,5x . \(\left(\dfrac{8}{5}:1\dfrac{1}{2}+\dfrac{1}{60}\right)=\dfrac{7}{60}.\left(2,91+0,09\right).4\)

Answer 1

[Nguyễn Lê Phước Thịnh]

a: =>2480-1570+(205-x)=1010

=>205-x=100

hay x=105

b: \(\Leftrightarrow x\cdot\dfrac{1}{2}\cdot\dfrac{13}{12}=\dfrac{7}{60}\cdot3\cdot4=\dfrac{7}{5}\)

=>x=168/65