Question

Va rorganiza ajutati-ma e urgent
426-(460-10×a)=366
[(58×a-80)÷25]×64=1280
[(a+54)×4+6]×4-184=800
1100-[(512-144÷a)×2]-171=1
[(420÷a)×4+24]÷4=11

Answer 1

426 - ( 460 - 10 × a ) = 366

 460 - 10 × a  = 426 - 366

460 - 10 × a  = 60

10 × a = 460 - 60

10 × a = 400

a = 400 : 10

a = 40

_________________________

[ ( 58 × a - 80 ) : 25 ] × 64 = 1 280

 ( 58 × a - 80 ) : 25 = 1 280 : 64

( 58 × a - 80 ) : 25 = 20

58 × a - 80 = 20 × 25

58 × a - 80  = 500

58 × a = 500 + 80

58 × a = 580

a = 580 : 58

a = 10

______________________

[ ( a + 54 ) × 4 + 6 ] × 4 - 184 = 800

[ ( a + 54 ) × 4 + 6 ] × 4 = 800 + 184

[ ( a + 54 ) × 4 + 6 ] × 4 = 984

( a + 54 ) × 4 + 6= 984 : 4

( a + 54 ) × 4 + 6 = 246

( a + 54 ) × 4 = 246 - 6

a + 54 = 240 : 4

a + 54 = 60

a = 60 - 54

a = 6

_________________________

1 100 - [ ( 512 - 144 : a ) × 2 ] - 171 = 1

1 100 - [ ( 512 - 144 : a ) × 2 ]  = 1 + 171

( 512 - 144 : a ) × 2 = 1 100 - 172

( 512 - 144 : a ) × 2 = 928

512 - 144 : a = 928 : 2

512 - 144 : a = 464

144 : a = 512 - 464

144 : a = 48

a = 144 : 48

a = 3

_________________________

[( 420 : a ) × 4 + 24 ] : 4 = 11

( 420 : a ) × 4 + 24 = 11 × 4

( 420 : a ) × 4 + 24 = 44

( 420 : a ) × 4 = 44 - 24

( 420 : a ) × 4 = 20

420 : a = 20 : 4

420 : a = 5

a = 420 : 5

a = 84