a) 461+x-45=387
<=> 416+x=387
<=> x= -28
b) 11+53-x=97
<=> 64-x=97
<=>x=-33
c) -x-84+213=-16
<=>-x+129=-16
<=> x=145
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a) (19x+2.5^2):14=(13-8)^2-4^2
b) x+(x+1)+(x+2)+...+(x+30)=1240
c) 11-(-53+x)=97
d) -(x+84)+213=-16
\(\frac{59-x}{41}+\frac{57-x}{43}+\frac{55-x}{45}+\frac{53-x}{47}+\frac{51-x}{49}=-5\) 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
Tìm x biết:
2 x X +68 = 126
3 x X -24 = 90
84 - 4 x X =16
(5 x X + 10 ) + 35 = 70
(6 x X - 18) - 42 =12
( 2 x X - 4 ) + 24
45 - ( 3 x X - 9 ) = 15
60 + (10 x X - 40 ) = 90
145 - (5 x X + 15 ) = 65
84 - ( 2 x X - 8 ) = 46
tìm x biết:
\(\left(\frac{45\frac{10}{63}-44\frac{25}{84}}{\left(2\frac{1}{3}-1\frac{1}{9}\right):4-\frac{3}{4}}:31\right).x=\frac{-1}{16}\)
tìm x biết:
\(\left[\frac{45\frac{10}{63}-44\frac{25}{84}}{\left(2\frac{1}{3}-1\frac{1}{9}\right):4-\frac{3}{4}}:31\right].x=-\frac{1}{16}\)
\(\left[\frac{45\frac{10}{63}-44\frac{25}{84}}{\left(2\frac{1}{3}-1\frac{1}{9}\right):4-\frac{3}{4}}:31\right]x=\frac{-1}{16}\)
giải phương trình 59-x/41+57-x/43+55-x/45+53-x/47+51-x/49=-5
Tìm x biết 59-x \41 + 57-x\ 43 + 55-x\45 + 53-x\47 + 51-x\49 = -5 . Giúp mình mình like cho . Ok. <3
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