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A x 5,3 + A x 3,7 + A = 320
A x ( 5,3 + 3,7 + 1 ) = 320
A x 10 = 320
A = 320 : 10
A = 32
sao mỗi lần mink ra câu hỏi là các bn đều trả lời sau khi tui giải được vậy
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a: =5,3-0,7-5,3=-0,7
b: =5,3-10+3,1+4,7
=10-10+3,1=3,1
c: =9+3,6-4,1+1,3
=9+0,8=9,8
d: =21/47+26/47+1/5+4/5
=1+1
=2
e: =3/8(58/3-33/3)
=3/8*25/3
=25/8
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8,4 x 3,7 + 8,4 x 5,3 + 8,4
= 8,4 x (3,7 + 5,3 + 1)
= 8,4 x 10
= 84
\(8,4\) x \(3,7+8,4\) x \(5,3+8,4\)
\(=8,4\) x \(\left(3,7+5,3\right)+8,4\)
\(=8,4\) x \(9+8,4\)
\(=75,6+8,4\)
\(=8,4\)
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TL:
54,7 x 3,7 + 54,7 x 5,3 + 54,7
= 54,7 x 3,7 + 54,7 x 5,3 + 54,7 x 1
= 54,7 x (3,7 + 5,3 + 1)
= 54,7 x 10
= 547
HT
2,9 + 3,7 + (-4,2) + (-2,9) + 4,2
(-6,5) . 2,8 + 2,8 . (-3,5)
(-6,37 . 0,4) . 2,5
(-0,125) . (-5,3) . 8
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a) [ 2,9+(-2,9)] + [ (-4,2)+4,2]+ 3,7
= 0+0+3,7
= 3,7
b)2,8.[(-6,5)+(-3,5)
= 2,8 . (-10)
= -28
c) - 6,37 . ( 0,4 . 2,5 )
= -6,37.1
= -6,37
d) ( -0,125 . 8) .( -5,3)
= -1. ( -5,3)
= 5,3
xong rồi đó
\(a\))\(2,9+3,7+\left(-4,2\right)+\left(-2,9\right)+4,2\)
\(=3,7\)
\(b\))\(\left(-6,5\right).2,8+2,8.\left(-3,5\right)\)
\(=2,8.\left(-6,5-3,5\right)\)
\(=2,8.\left(-10\right)\)
\(=-28\)
\(c\))\(\left(-6,37.0,4\right).2,5\)
\(=\left(-6,37\right).\left(0,4.2,5\right)\)
\(=-6,37\)
\(d\))\(\left(-0,125\right).\left(-5,3\right).8\)
\(=\left(-5,3\right).\left(-1\right)\)
\(=5,3\)
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x + 3,7.x + x.5,3 = 2018
x.( 1 + 3,7 + 5,3 ) = 2018
x . 10 = 2018
x = 201,8
x+3,7.x+x.5,3=2018
x( 1+3,7+5,3) =2018
x. 10 =2018
x =2018:10
x =201,8
Vậy x = 201,8
Hok tốt nha bn
a×3,7+a×5,3+a=45
a×3,7+a×5,3+ax1=45
ax(3,7+5,3+1)=45
ax10=45
a=45:10
a=4,5
Vậy a=4,5