Question

alflati x din egalitatea:
7^3-3^4+{2019^0•3+2^5+7^1•[2•6^3-2^4•(10^3+2^3):x•31]}=2020•2019-2019^2​

Answer 1

Răspuns:

7^3-3^4+{2019^0•3+2^5+7^1•[2•6^3-2^4•(10^3+2^3):x•31]}=2020•2019-2019^2​

343-81+{1·3+32+7·[2·216-16·(1000+8):x·31)]}=2019(2020-2019)

262+[3+32+7·(432-16·1008:x·31)]=2019·1

262+[35+7·(432-16·1008:x·31)]=2019

35+7·(432-16·1008:x·31)=2019-262

7·(432-16·1008:x·31)=1757-35

432-16·1008:x·31=1722:7

16·1008:x·31=432-246

16·1008:x=186:31

16128:x=6

x=16128:6

x=2688

Answer 2

7 ^ 3 - 3 ^ 4 + { 2019 ^ 0 × 3 + 2 ^ 5 + 7 ^ 1 × [ 2 × 6 ^ 3 - 2 ^ 4 × ( 10 ^ 3 + 2 ^ 3 ) : x × 31 ] } = 2020 × 2019 - 2019 ^ 2

343 - 81 + { 1 × 3 + 32 + 7 × [ 2 × 216 - 16 × ( 1000 + 8 ) : x × 31 ] } = 4078380 - 4076361

262 + [ 3 + 32 + 7 × ( 432 - 16 × 1008 : x × 31 ) ] = 2019

262 + [ 35 + 7 × ( 432 - 16128 : x × 31 ) ] = 2019

35 + 7 × ( 432 - 16128 : x × 31 ) = 2019 - 262

35 + 7 × ( 432 - 16128 : x × 31 ) = 1757

7 × ( 432 - 16128 : x × 31 ) = 1757 - 35

7 × ( 432 - 16128 : x × 31 ) = 1722

432 - 16128 : x × 31 = 1722 : 7

432 - 16128 : x × 31 = 246

16128 : x × 31 = 432 - 246

16128 : x × 31 = 186

16128 : x = 186 : 31

16128 : x = 6

x = 16128 : 6

x = 2688