\(\Leftrightarrow x+x-x-3-x-30+x-2=0\)
\(\Leftrightarrow x=35\)
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tìm x
a., (x-36):18=12
b., (3.x-5):2=85
c.,(70-2.x):2=35
d., (3.x-3).(2.x-10)=0
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a) x. (x + 2)= 0
b) (x - 3).( 4 - x )
c) x^2= 2x
d) (x - 5 ). ( x^2 + 1 ) =0
e) -12. ( x - 5 ) + 7 . ( 3 - x )=5
g) 30. ( x +2) + 6. ( x - 5 ) - 24x= 102
h) ( x + 1 ) + (x + 2 ) + ... + ( x + 99) =0
( x + 1 + ( x + 3 ) + ........+ ( x+ 99 ) = 0
x + ( x+ 1 ) + ( x + 2 ) +......+ (x + 30 ) = 1240
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(x+1-5)+7(3-x)=5 30(x+2)-6(x-5)-24x=100
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