Question

va rooooooggg muuulllttttt!!!!!!!!!! dau coroana celui mai bun raspuns!!!​

Answer 1

Răspuns:

d)

( 1 000 - d × 2 - 25 × 4 ) : 6 = 143

1 000 - d × 2 - 100 = 143 × 6

1 000 - d × 2 - 100 = 858

1 000 - d × 2 = 858 + 100

1 000 - d × 2 = 958

d × 2 = 1 000 - 958

d × 2 = 42

d = 42 : 2

d = 21

e)

( e - 406 : 2 + 29 × 4 ) : 3 - 108 : 9 = 132

( e - 203 + 116 ) : 3 - 12 = 132

( e - 203 + 116 ) : 3 = 132 + 12

( e - 203 + 116 ) : 3 = 144

e - 203 + 116 = 144 × 3

e - 203 + 116 = 432

e - 203 = 432 - 116

e - 203 = 316

e = 316 + 203

e = 519

f)

f : 7 + 25 = [ 900 - ( 300 - 48 × 5 ) × 9 ] : 9

f : 7 + 25 = [ 900 - ( 300 - 240 ) × 9 ] : 9

f : 7 + 25 = ( 900 - 60 × 9 ) : 9

f : 7 + 25 = ( 900 - 540 ) : 9

f : 7 + 25 = 360 : 9

f : 7 + 25 = 40

f : 7 = 40 - 25

f : 7 = 15

f = 15 × 7

f = 105

Answer 2

d)

(1000-d×2-25×4):6=143

1000-d×2-100=143×6

1000-d×2-100=858/+100

1000-d×2=958

d×2=1000-958

d×2=42

d=42:2

d=21

e)

(e-406:2+29×4):3-108:9=132

(e-203+116):3-12=132

(e-203+116):3=144

e-203+116=144×3

e-203+116=432

e-203=432-116

e-203=316

e=203+316

e=519

f)

f:7+25=[900-(300-48×5)×9]:9

f:7+25=[900-(300-240)×9]:9

f:7+25=(900-60×9):9

f:7+25=(900-540):9

f:7+25=360:9

f:7+25=40

f:7=40-25

f:7=15

f=7×15

f=105