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b) (3.x - 24) . 73 = 2 . 74
(3.x - 24) . 343 = 4802
3.x - 24 = 4802 : 343
3.x - 24 = 14
3.x = 14 + 24
3.x = 38
Tự giải :))
c) x = 1
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[(6xX-72):2-84]x28=5628
[(6xX-72):2-84]=201
(6xX-72):2=285
(6xX-72)=570
6xX=642
X=642:6=107
Vậy X=107
( ( 6 x X - 72 ) : 2 - 84 ) * 28 = 5628
( ( 6 x X - 72 ) : 2 - 84 ) = 201
( 6 x X - 72 ) : 2 = 285
( 6 x X - 72 ) = 570
6 x X = 642
X = 642 : 6 = 107
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106 − x = − 58 – 8 106 − x = − 66 − x = − 66 − 106 − x = − 172 x = 172.
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a) x – 32 = − 5 − 17 ⇔ x – 32 = − 32 ⇔ x = − 32 + 32 ⇔ x = 0.
b) 16 – x = 21 – − 8 ⇔ 16 – x = 21 + 8 ⇔ 16 − x = 30 ⇔ − x = 30 − 16 ⇔ − x = 14 ⇔ x = − 14.
c) 106 − x = − 58 – 8 ⇔ 106 − x = − 66 ⇔ − x = − 66 − 106 ⇔ − x = − 172 ⇔ x = 172.
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25-3.(x-8)=106
3.(x-8)=25-106
3.(x-8)=-81
x-8=-81:3
x-8=-27
x=-27+8
x=-19
25 - 3 . ( x - 8 ) = 106
3 . ( x - 8 ) = 25 - 106 = -81
x - 8 = ( -81 ) : 3 = -27
x = ( -27 ) + 8 = -19
Vậy x = -19
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a. 25 + 3(x-8) = 106
3(x-8) = 106 - 25 = 81
x -8 = 81 : 3 = 27
x = 27 +8 = 35
b. 32(x +4) - 52 = 5.52
9(x+4) - 25 = 5.25 = 125
9(x+4) = 125 + 25 = 150(Đề sai)
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\(a,25+3\left(x-8\right)=106\\ 3\left(x-8\right)=81\\ x-8=27\\ x=35\)
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25+3.(x-8)=106 =>3x-3.8=106-25
3x-24=81
3x=81+24
3x=105
x=105:3
x=35
vậy x=35
25 + 3 * ( x - 8 ) = 106
3 * ( x - 8 ) = 106 - 25
3 * ( x - 8 ) = 81
x - 8 = 81 : 3
x - 8 = 27
x = 27 + 8
x = 35
k mk nha