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a) (17.x - 25 ) : 8 = 92 : 65= 92/65
17x - 25 = 92/65.8
17x = 2361/65
x= 2361/65 : 17=2361/1105
b) x- 60 = 2017101 - 2017100
x-60 = 2017
x = 2017 + 60
x = 2077
c) 5x . 30-3x.x = 45
5x.3x.x = 45 + 30 = 75
15x.x = 75
(17x-25):8+65=92
(17x-25):8 =92-65
(17x-25):8 =27
(17x-25) =\(27\times8\)
(17x-25) =216
17x =216+25
17x =241
x =241:7
x =\(\frac{241}{17}\)
T mk nhé bạn ^...^ ^_^
(17x-25):8+65=92
(17x-25):8=92-65
(17x-25):8=27
(17x-25)=27.8
17x-25=216
17x=216+25
17x=241
x=241:17
x=
a) (135 - 35) . (-37) + 37 . (-42 - 58)
= 100 . 0 . (-100)
= 0
b) -65 . (87 - 17) - 87 . (17 - 65)
= -65 . 70 - 87 . (-48)
= -4550 - 135
= -4415
a) \(65.16=1040\)
\(\rightarrow\left(-65\right).16=65.\left(-16\right)=-1040\)
\(\left(-65\right).\left(-16\right)=1040\)
\(\Rightarrow65.16=\left(-65\right).\left(-16\right)=1040\)
b) \(25.\left(-27\right)=-675\)
\(\rightarrow\left(-25\right).\left(-17\right)=25.17=675\)
\(\left(-25\right).17=-675\)
\(\Rightarrow25.\left(-17\right)=\left(-25\right).17=-675\)
(17.x-25):8+65=9^2
(17.x-25):8+65=81
(17.x-25):8 =81-65
(17.x-25):8 =16
17.x-25 = 16.8
17.x-25 =128
17.x =128+25
17.x =153
x =153:17
Vậy x =9
mik nhaaaa
a, \(\left(-23\right).43+\left(-23\right).65-\left(-23\right).8\\ =\left(-23\right).\left(43+65-8\right)\\ =\left(-23\right).100=-2300\)
b,\(\left(-43\right).25+25.\left(-19\right)+25.\left(-38\right)\\ =25.\left[\left(-43\right)+\left(-19\right)+\left(-38\right)\right]\\ =25.\left(-100\right)=-2500\)
c,\(\left(-26\right).13+86.\left(-26\right)+\left(-26\right)\\ =\left(-26\right).\left(13+86+1\right)\\ =\left(-26\right).100=-2600\)
d,\(\left(-17\right).39+\left(-17\right)+\left(-17\right).60\\ =\left(-17\right).\left(39+1+60\right)\\ =\left(-17\right).100=-1700\)
a) (-32) . 43 + (-32) . 65 - (-32) . 8
= (-32) . (43 + 65 - 8)
= (-32) . 100
= -3200
b) (-43) . 25 + 25 . (-19) + 25 . (-38)
= 25 . [(-43) + (-19) + (-38)]
= 25 . (-100)
= -2500
c) (-26) . 13 + 86 . (-26) + (-26)
= (-26) . (13 + 86 + 1)
= (-26) . 100
= -2600
d) (-17) . 39 + (-17) + (-17) . 60
= (-17) . (1 + 39 + 60)
= (-17) . 100
= -1700
g) (15 + 37) + (52 – 37 – 17) = 15 + 37 + 52 – 37 – 17 = 15 + 52 – 17 = 50 h) (38 – 42 +14) - (38 – 42 - 15) = 38 – 42 +14 - 38 + 42 + 15 = 14 + 15 = 29 i) (27 + 65 ) + (346 - 27- 65) = 27 + 65 + 346 - 27- 65 = 346 k) - (27 + 65) - (346 – 27 - 65) = -27 - 65 - 346 + 27 + 65 = -346 l) (42 – 69 + 17) - (42 + 17) = 42 – 69 + 17 - 42 - 17 = – 69 m) 24. (16 - 5) – 16. (24 – 5 ) = 24. 16 - 24 . 5 - 16 . 24 + 16. 5 = - 24 . 5 + 16. 5 = -8 . 5 = -40 n) (-12). 47 – 12 . 52 + (-12) = -12 (47 - 52 + 1) = -12 . (-4) = 48 p) 51 . (69 - 25) – 69. (51 - 25) = 51 . 69 - 51 . 25 – 69. 51 + 69. 25 = - 51 . 25 + 69. 25 = (- 51+ 69).25 = 450 |
\(\frac{241}{17}\)