Question

tìm x:

a) \(\left(0,3+x\right).2\dfrac{1}{4}:x=-\dfrac{13}{40}\)

b) \(0,25.x-\dfrac{27}{8}.x=\dfrac{3}{4}\)

c) \(\dfrac{7}{8}+4\dfrac{1}{2}:x=-\dfrac{13}{40}\)

d) \(32\%-0,25:x=-3\dfrac{2}{5}\)

Answer 1

d, 32%-0,25:x=-3/2/5

0,32-0,25:x=-3,4

-0,25:x=-3,4-0,32

-0,25:x=-3,72

x=-0,25:-3,72

x=25/372

Answer 2

7/8+4/1/2:x=-13/40

0,875+4,5:x=-0,325

4,5:x=-0,325-0,875

4,5:x=-1,2

x=4,5:-1,2

x=-3,75

Answer 3

b, 0,25.x-27/8.x=3/4

x.(0,25-3,375)=0,75

x.(-3,125)=0,75

x=0,75:(-3,125)

x=-0,24