15 + x + 27 + 53 = 201
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\(x\div15+x+27+53=201\)
\(x\div15+x+27=201-53\)
\(x\div15+x+27=148\)
\(x\div15+x=148-27\)
\(x\div15+x=121\)
x : 16 = 121 => x = 121 x 16 = 1936
\(x\div\left(15+1\right)=121\)
a) 15 + x + 27 + 53 = 201
=> x + ( 15 + 27 + 53 ) = 201
=> x + 95 = 201
=> x = 201 - 95
=> x = 106
Vậy x = 106
b) 50 * x + 20 617 = 80 617
=> 50 * x = 80 617 - 20 617
=> 50 * x = 60 000
=> x = 60 000 : 50
=> x = 1 200
Vậy x = 1 200
c) x * 25 + x * 35 = 90 * 360
=> x * ( 25 + 35 ) = 32 400
=> x * 60 = 32 400
=> x = 32 400 : 60
=> x = 540
Vậy x = 540
9900 : 36 - 15 x 11
= 275 - 165
= 110
9700 : 100 + 36 x 12
= 97 + 432
= 529
( 15792 : 336 ) x 5 + 27 x 11
= 47 x 5 + 297
= 235 + 297
= 532
( 160 x 5 - 25 x 4 ) : 4
= ( 800 - 100 ) : 4
= 700 : 4
= 175
1036 + 64 x 52 - 1827
= 1036 + 3328 - 1827
= 4364 - 1827
= 2537
215 . 869 + 215 . 14
= 215 . ( 869 + 14 )
= 215 . 883
= 189945
a) `123 - 27 + 27 + 13 - 123`
`= (123 - 123) + (27 - 27) + 13`
`= 0 + 0 + 13`
`= 13`
`---`
b) `175 + 25 + 13 + 15 - 175 - 25`
`= (175-175)+(25-25)+25+13`
`=0+0+25+13`
`=28`
`---`
c) \(53\times39+47\times39+53\times21+47\times21\)
\(=\text{[}\left(53+47\right)\times39]+\left[\left(53+47\right)\times21\right]\)
\(=\left(100\times39\right)+\left(100\times21\right)\)
\(=3900+2100\)
`=6000`
`---`
d) \(49\times35+49\times16-49\times61\)
`=` \(49\times\left(35+16-61\right)\)
`=` \(49\times\left(-10\right)\)
`=-490`
x-27+15=53
x-27=53-15
x-27=38
x=38+27
x=65
x-35=43-14
x-35=29
x=29+35
x=64
x-27+15=53
<=> x-27=53-15
<=>x-27=38
<=>x=38+27
<=>65
x-35=43-14
<=>x-35=29
<=>x=29+35
<=>x=64
15 + x + 27 + 53 = 201
15 + x + 80 = 201
15 + x = 121
x= 106
x + 95 = 201
x = 201 - 95
x = 106
Vậy x = 106
Tk mk nha