Tim x biet : - 12 ( x-5) + 7 ( 3 - x ) = 5
Những câu hỏi liên quan
tim x biet :3/[x+2][x+5]+5[x+5][x+10]+7/[x+10][x+15]=x/[x+12][x+17]
Tim x biet:
-12*(x-5)+7*(3-x)=5
\(-12\left(x-5\right)+7\left(3-x\right)=5.\)
\(\Leftrightarrow-12x+60+21-7x=5\)
\(\Leftrightarrow-12x-7x=5-60-21\)
\(\Leftrightarrow-19x=-76\)
\(\Rightarrow x=\frac{-76}{-19}=4\)
Vậy \(x=4\)
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Tim so nguyen x biet :
-12 (x - 5 ) + 7(3 - x )
tim x biet : a,-12/21×x + 3/7=-4/3, b, 2x +-3^2=5/4 , c, 75% x- 2/5=3/10, d, (3x-2)×(x+7)
1) Tim x biet :
a) - 12 (x - 5) + 7 . (3 - x) = 5
b) 30 . (x + 2) - 6 . (x - 5) - 24x = 100
tim x biet 2^(x-1) +5^(x-2) =7/12
tim x biet
\(\frac{-5}{6}-x=\frac{7}{12}+\frac{-1}{3}\)
\(\frac{-5}{6}-x=\frac{7}{12}+\frac{-1}{3}\)
\(\frac{-5}{6}-x=\frac{7}{12}-\frac{4}{12}\)
\(\frac{-5}{6}-x=\frac{1}{4}\)
\(x=\frac{-5}{6}-\frac{1}{4}\)
\(x=\frac{-20}{24}-\frac{6}{24}\)
x=\(\frac{-13}{12}\)
Vậy x=\(\frac{-13}{12}\)
chúc bạn học tốt~
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ai biet giup minh voi
| - 18 | + ( - 12) va 2^3 .2^2+ 5^7 : 5^5 - 3^2 .6
va tim x biet
3^10 : ( 43- 4x ) = 3^7
Tim x, biet : 5/4 nhan x = 5/8 + 3/12
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