146-2.410-x=18
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315 + ( 146 - x ) = 401
146 - x = 401 - 315
146 - x = 86
x = 146 - 86
x = 60
x - 36 : 18 = 12
x - 2 = 12
x = 12 + 2
x = 14
( x - 36 ) : 18 = 12
x - 36 = 216
x = 216 + 36
x = 252
**** cho mình nha! Cảm ơn bạn!
315+(146-x)=401
146 - x =401-315
146-x = 86
x =146-86
x =60
x-36:18=12
x - 2 =12
x =12-2
x =10
(x-36):18=12
x-36 =12x18
x-36 =216
x =216-36
x = 180
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26 + 18x = 16x + 146
=> 18x - 16x = 146 - 26
=> 2x = 120
=> x = 60
Vậy: x = 60
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b: Ta có: 7x-8=713
nên 7x=721
hay x=103
c: Ta có: x-36:18=12
nên x-2=12
hay x=14
d: Ta có: (x-36):18=12
nên x-36=216
hay x=252
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a) 142 x 12 + 42 x 18 = 142 x (12 +18) = 142 x 30 = 4260
b) 49 x 365 – 39 x 365 = (49-39) x 365 = 10 x 365 = 3650
c) 4 x 18 x 25 = 18 x (4 x 25) = 10 x 100 = 1800
_k me_
@Min_ngu_ngục
_copy is not fun_
Tính bằng cách thuận tiện nhất :
a) 146 x 12 + 142 x 18
b) 49 x 365 - 39 x 365
c) 4 x 18 x 25
Bài giải
a) 142 x 12 + 142 x 18 = 142 x (12 + 18) = 142 x 30 = 4260
b) 49 x 365 – 39 x 365 = (49 – 39) x 365 = 10 x 365 = 3650
c) 4 x 18 x 25 = (4 x 25) x 18 = 100 x 18 = 1800
Chúc bạn học tốt nha!
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a.2436 :x = 12
x = 2436 : 12
x = 203
b. 6x - 5 = 613
6x = 613 + 5
6x = 618
x = 618 : 6
x = 13
c.( x - 47 ) - 115 = 7
x - 47 = 7 + 115
x - 47 = 122
x = 122 + 47
x =169
d . 315 + (146 - x ) =401
146 - x = 401 - 315
146 - x = 86
x = 146 - 86
x = 60
e.( x - 36 ) : 18 = 12
x - 36 = 12 x 18
x - 36 = 216
x = 216 + 36
x = 252
a , 2 436 : x = 12
x = 2 436 : 12
x = 203
b , 6x - 5 = 613
6x = 618
x = 103
c , ( x - 47 ) - 115 = 7
x - 47 = 122
x = 169
d , 315 + ( 146 - x ) = 401
146 - x = 401 - 315
146 - x = 86
x = 146 - 86
x = 60
e , ( x - 36 ) : 18 = 12
x - 36 = 216
x = 216 + 36
x = 252
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\(272+\left(146+x\right)=118\)
\(272+146+x=118\)
\(418+x=118\)
\(x=118-418\)
\(x=-300\)
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146 13 ( 18 7 + 68 13 ) = 146 13 ( 234 476 ) 91 = 146 13 - 710 91 = 1022 - 710 91 = 312 91 = 24 7 = 312 91
146 - 2 . 410-x = 18
=> 2 . 410-x = 146 - 18
=> 2 . 410-x = 128
=> 410-x = 64
=> 410-x = 43
=> 10 - x = 3
=> x = 7
2.410-x = 146 - 18
2.410-x = 128
(22)10-x = 128 : 2
22(10-x) = 64
\(\Rightarrow\)22(10-x) = 26
\(\Rightarrow\)2(10 - x ) = 6
10 - x = 6 : 2
10 - x = 3
x = 10 - 3
x = 7