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a) x*412+x*15-x*325=1200=>x*(412+15-325)=1200=>x*102=1200=>x=1200/102=\(\frac{200}{17}\)
b)136*x-72*x+x*36=39000=>x*(136-72+36)=39000=>x*100=39000=>x=39000/100=390
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a) 512 x 20 x 5
= 512 x (20 x 5)
= 512 x 100 = 51 200
b) 125 x 32 x 8
= (125 x 8) x 32
= 1000 x 32
= 32 000
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A = \(\dfrac{27}{512}\) \(\times\) \(\dfrac{327}{213}\) \(\times\) \(\dfrac{512}{57}\) \(\times\) \(\dfrac{213}{54}\) \(\times\) \(\dfrac{57}{327}\)
A = \(\dfrac{27\times327\times512\times213\times57}{54\times327\times512\times213\times57}\)
A = \(\dfrac{27}{54}\)
A = \(\dfrac{1}{2}\)
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412 - 15 x (27 - X) = 97
X = 27 - (412 - 97) : 15
X = 27 - 315 : 15
X = 27 - 21
X = 6.
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A = 512 x 4 + 512 x 58
A = 512 x (4 + 58)
A = 512 x 62
A = 31 744
B = 312 x 36 - 312 x 26
B = 312 x (36 - 26)
B = 312 x 10
B = 3120
C = 745 x 11 - 745
C = 745 x (11 - 1)
C = 745 x 10
C = 7450
D = 837 x 15 - 837 x 5
D = 837 x (15 - 5)
D = 837 x 10
D = 8370
E = 578 x 78 - 578 x 14 + 578 x 36
E = 578 x (78 - 14 + 36)
E = 578 x 100
E = 57 800
F = 645 x 78 + 645 x 22
F = 645 x (78 + 22)
F = 645 x 100
F = 64 500
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a . x + 3 4 = 5 3 x = 5 3 - 3 4 x = 11 12 b . x - 1 6 = 5 12 x = 5 12 + 1 6 x = 7 12
vẫn thắc mác tại sao lại có b trong khi cả bài toán ko cần b🙋🏻♀️