\(\frac{57-x}{57}\)\(=\)\(\frac{14}{25}\)
tìm x
Những câu hỏi liên quan
\(\frac{59-x}{41}+\frac{57-x}{43}+\frac{55-x}{45}+\frac{53-x}{47}+\frac{51-x}{49}=-5\) tìm x
\(\frac{x-5}{1990}+\frac{x-15}{1980}+\frac{x-25}{1970}=\frac{x-1990}{5}+\frac{x-1980}{15}+\frac{x-1970}{25}\) tìm x
\(\frac{x+14}{86}+\frac{x+15}{85}+\frac{x+16}{84}+\frac{x+17}{83}+\frac{x+116}{4}=0\) tìm x
1. \(\Leftrightarrow\frac{59-x}{41}+1+\frac{57-x}{43}+1+\frac{55-x}{45}+1+\frac{51-x}{49}+1=-5+5\)
\(\Leftrightarrow\frac{100-x}{41}+\frac{100-x}{43}+\frac{100-x}{45}+\frac{100-x}{47}+\frac{100-x}{49}=0\)
\(\Leftrightarrow\left(100-x\right)\left(\frac{1}{41}+\frac{1}{43}+\frac{1}{45}+\frac{1}{47}+\frac{1}{49}\right)=0\)
\(\Leftrightarrow x-100=0\Leftrightarrow x=100\)
2. \(\Leftrightarrow\frac{x-5}{1990}+1+\frac{x-15}{1980}+1+\frac{x-25}{1970}=\frac{x-1990}{5}+1+\frac{x-1980}{15}+1+\frac{x-1970}{25}+1\)
\(\Leftrightarrow\frac{x-1995}{1990}+\frac{x-1995}{1980}+\frac{x-1995}{1970}=\frac{x-1995}{5}+\frac{x-1995}{15}+\frac{x-1995}{25}\)
\(\Leftrightarrow\frac{x-1995}{1990}+\frac{x-1995}{1980}+\frac{x-1995}{1970}-\frac{x-1995}{5}-\frac{x-1995}{15}-\frac{x-1995}{25}=0\)
\(\Leftrightarrow\left(x-1995\right)\left(\frac{1}{1990}+\frac{1}{1980}+\frac{1}{1970}-\frac{1}{5}-\frac{1}{15}-\frac{1}{25}\right)=0\)
\(\Leftrightarrow x-1995=0\Leftrightarrow x=1995\)
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Tìm x thuộc N, biết: − 2 5 + 1 6 + − 1 5 ≤ x < − 3 4 + 9 7 + − 1 4 + 5 7
Tìm x biết:a) frac{155x-24}{51}+frac{185x-48}{57}+frac{205x-3}{61} 16b) frac{56x+95}{37}+frac{136x+120}{57}+ frac{216x+187}{67} 9c)frac{22x-15}{21}+frac{26x-25}{23}+frac{34x+9}{27} 14d) frac{2019-x}{9}+frac{19-x}{2000}+frac{2009-x}{10}+frac{4x}{2019} 1
Đọc tiếp
Tìm x biết:
a) \(\frac{155x-24}{51}\)+\(\frac{185x-48}{57}\)+\(\frac{205x-3}{61}\)= 16
b) \(\frac{56x+95}{37}\)+\(\frac{136x+120}{57}\)+ \(\frac{216x+187}{67}\)= 9
c)\(\frac{22x-15}{21}\)+\(\frac{26x-25}{23}\)+\(\frac{34x+9}{27}\)= 14
d) \(\frac{2019-x}{9}\)+\(\frac{19-x}{2000}\)+\(\frac{2009-x}{10}\)+\(\frac{4x}{2019}\)= 1
Tìm x :
\(\frac{\left(7^{x+2}+7^{x+1}+7^x\right)^{57}}{57}=\frac{5^{2x}+5^{2x+1}+5^{2x+3}}{131}\)
bài 1 Tìm x;y thuộc N* niết
\(\frac{x}{5}-\frac{2}{y}=\frac{2}{15}\)
b) D= \(\frac{2}{3\cdot5}+\frac{3}{5\cdot8}+\frac{11}{8\cdot19}+\frac{13}{19\cdot32}+\frac{25}{32\cdot57}+\frac{30}{57\cdot87}\)
Tìm x:
\(\frac{x}{1.5}+\frac{x}{5.9}+\frac{x}{9.13}+...+\frac{x}{53.57}=\frac{56}{57}\)
x/1 - x/5 + x/5 - x/9 +x/9 - x/13 ..... + x/53 - x/57 = 56/57
x/1 - x/57 = 56/57
56x/57 = 56/57
56x = 56
=> X = 1
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\(\frac{x}{1.5}+\frac{x}{5.9}+\frac{x}{9.13}+...+\frac{x}{53.57}=\frac{56}{57}\)
\(\Leftrightarrow\frac{x}{1}-\frac{x}{5}+\frac{x}{5}-\frac{x}{7}+\frac{x}{9}-\frac{x}{13}+...+\frac{x}{53}-\frac{x}{57}=\frac{56}{57}\)
\(\Leftrightarrow\frac{x}{1}-\frac{x}{57}=\frac{56}{57}\)
\(\Leftrightarrow\frac{x.57}{57}-\frac{x}{57}=\frac{56}{57}\)
\(\Leftrightarrow\frac{x.57-x}{57}=\frac{56}{57}\)
\(\Leftrightarrow\frac{x.56}{57}=\frac{56}{57}\)
\(\Leftrightarrow x=1\)
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\(\frac{x-63}{1953}+\frac{x-61}{1955}+\frac{x-59}{1957}+\frac{x-57}{1959}=\frac{x-1953}{63}+\frac{x-1955}{61}+\frac{x-1957}{59}+\frac{x-1959}{57}\)các bạn giúp mình giải bài tập này cho mình với
trừ 1 vào mỗi phân thức ở hai vế
\(\left(x-2016\right)\left(\frac{1}{1953}+\frac{1}{1955}+\frac{1}{1957}+\frac{1}{1959}-\frac{1}{63}-\frac{1}{61}-\frac{1}{59}-\frac{1}{57}\right)=0\)
vì 1/1953 + 1/1955 + 1/1957 + 1/1959 -1/63 -1/61-1/59-1/57 khác0
=> x-2016=0 => x=2016
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bạn có thể làm rỏ hơn được không.mình cảm ơn bạn nhiều
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\(\frac{x-1}{59}+\frac{x-2}{58}+\frac{x-3}{57}=\frac{x-4}{56}+\frac{x-5}{56}+\frac{x-6}{54}\)Tìm x
Xin lỗi mình làm hơi tắt nha !!!Còn 1 cách nữa ,nếu bạn muốn thì nói với mình nha !!
Ta có : \(\frac{x-1}{59}+\frac{x-2}{58}+\frac{x-3}{57}=\frac{x-4}{56}+\frac{x-5}{55}+\frac{x-6}{54}\)
\(\Leftrightarrow\frac{x}{59}+\frac{x}{58}+\frac{x}{57}-\frac{x}{56}-\frac{x}{55}-\frac{x}{54}=\frac{1}{59}+\frac{2}{58}+\frac{3}{57}-\frac{4}{56}-\frac{5}{55}-\frac{6}{54}\)
<=> x = 60
Vậy x = 60
Bạn kiểm tra lại đề nhé. Chỗ
\(.....=\frac{x-4}{56}+\frac{x-5}{56}+\frac{x-6}{54}\)
Tìm x thuộc Z, biết:a)
−
2
5
+
1
6
+
−
1
5
≤
x
−
3
4
+
9
7
+
−
1
4
+
5
7
b)
5
17
+
−...
Đọc tiếp
Tìm x thuộc Z, biết:
a) − 2 5 + 1 6 + − 1 5 ≤ x < − 3 4 + 9 7 + − 1 4 + 5 7
b) 5 17 + − 4 9 + 12 17 < x ≤ − 3 7 + 7 15 + 4 − 7 + 8 15 + 9 3
a) − 2 5 + 1 6 + − 1 5 ≤ x < − 3 4 + 9 7 + − 1 4 + 5 7 ⇔ − 13 30 ≤ x ≤ 1 ⇔ x ∈ 0 ; 1
b) 5 17 + − 4 9 + 12 17 < x ≤ − 3 7 + 7 15 + 4 − 7 + 8 15 + 9 3 ⇔ 5 9 < x ≤ 3 ⇔ x ∈ 1 ; 2 ; 3
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