1.Tìm x, biết: x+13/12+21/20+31/30+43/42+57/56+73/72+91/90=277/30
4. Tìm x biết:
\(\dfrac{1}{3}-\dfrac{1}{12}-\dfrac{1}{20}-\dfrac{1}{30}-\dfrac{1}{42}-\dfrac{1}{56}-\dfrac{1}{72}-\dfrac{1}{90}-\dfrac{1}{110}=x-\dfrac{5}{13}\)
Giải chi tiết giúp mình nha.
B= 1/3 - 1/12 - 1/20 - 1/30 - 1/42 - 1/56 - 1/72 - 1/90
2x - 3 = x + 1/2
1,tìm x,y biết:
x-2011/12+x-2011/20+x-2011/30+x-2011/42+x-2011/56+x-2011/72=16/9
Tìm x biết \(\frac{x-1}{12}+\frac{x-1}{20}+\frac{x-1}{30}+\frac{x-1}{42}+\frac{x-1}{56}+\frac{x-1}{72}=\frac{16}{9}\)
tìm x biết 1/30 + 1/42+1/56+1/72+1/90+1/110+1/132 - x=2/3
Tìm x biết : 1/30 + 1/42 +1/56 +1/72 + 1/90 + 1/110 + 1/132 - x = 2/3
Tìm x biết 1/30+1/42+1/56+1/72+1/90+1/110+1/132 -x = 2/3
20/9-x=1/12+1/20+1/30+1/42+1/56+1/72