57 X x+x=23490
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`@` `\text {Ans}`
`\downarrow`
`23416+ 23490 \times 19`
`= 23416 + 446310`
`= 469726`
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a) (9458-x)x5=41195 b) (9x x)x6=23490
9458-x =41195:5 9 x x =23490:6
9458-x =8239 9 x x =3916
x=9458-8239 x = 3915:9
x=1219 x=435
c)9x(x+5)=729
x+5=729:9
x+5=81
x=81-5
x=76 k mk nha
a) (9458 - X) x 5 = 41195
9458 - X = 41195 : 5
9458 - X = 8239
X = 9458 - 8239
X = 1219
b) (9 x X) x 6 = 23490
9 x X = 23490 : 6
9 x X = 3915
X = 3915 : 9
X = 435
c) 9 x (X + 5) = 729
X + 5 = 729 : 9
X + 5 = 81
X = 81 - 5
X = 76
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a)3x(x+726)=2745.
= x+726 =2745:3.
= x+726 =915.
= x =915-726
= x =189.
b)(x+426):3=2625.
= x+426 =2625x3
= x+426 =7875
= x =7875-426
= x =7449.
c)(9458-x)x5=41195.
= 9458-x =41195:5
= 9458-x =8239.
= x =9458-8239.
= x =1219.
d)Sai đề rồi bạn nhé.
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57 x 12 + 57 x 13 + 57 x 16
= 57 x (12 + 13 + 16)
= 57 x 41
= 2337
57 x 12 + 57 x 13 + 57 x 16
= 57 x (12 + 13 + 16)
= 57 x 31
= 1767
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57 x 76 + 13 x 57 + 11 x 57
= 57 x ( 76 + 11 + 13 )
= 57 x 100
= 5700
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a ) x = 5 6 ; b ) x = 8 7 ; c ) x = − 11 14 − ; d ) x = − 13 12
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\(a,C1=744+186\\ =930\\ C2=93\times\left(8+2\right)\\ =93\times10=930\\ b,C1:=324+576\\ =900\\ C2=9\times\left(36+64\right)\\ =9\times100\\ =900\\ c,C1=456-399\\ =57\\ C2=57\times\left(8-7\right)\\ =57\)
\(a)\)\(93\times8+93\times2\)
\(=98\times\left(8+2\right)\)
\(=98\times10\)
\(=980\)
\(b)36\times9+64\times9\)
\(=9\times\left(36+64\right)\)
\(=9\times100\)
\(=900\)
\(c)57\times8+57\times7\)
\(=57\times\left(8-7\right)\)
\(=57\times1\)
\(=57\)