( 45.) [(624 + 123:3-a):6] X3 +254 = 554 46.) 9 236 - [(3 245 - 1 236 +63 x 4:2:5+ a+ 23 124 = 31 860 47. (364:7:(128 x 5 - 124 x 3-a)] x 45-23 x 13 = 286 48.) [(20+339:3+a:4) 7-5 400]:3 -22%3+125 x 8 = 1 000 c) [(64 x 33 x 2:4 – 500 x 2}:2+ 5x a] -6 x 12+999:9= 112 50) [(72:2-3x 4) 36-195) - (124 x 6-301x2) = 195 51.) 100 - [36 +6x9-(a:3+15)]:3=76 52.) (936-(8x 100+ a)]:[10+(35:5 + 8)] = 4

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Răspuns :

Jojoi54 Jojoi54 · Answer 1 · 2022-01-15T18:07:57+02:00

Răspuns:

[(624 + 123:3-a):6] X3 +254 = 554

[(624 + 41-a):6] X3 =554-254

[(624 + 41-a):6] X3 =300

[(624 + 41-a):6]=300:3

(624+41-a):6=100

(665-a)=100x6

665-a=600

a=665-600

a=65

9 236 - [(3 245 - 1 236 +63 x 4:2:5+ a+ 23 124 = 31 860

unde se închid parantezele

[364:7:(128 x 5 - 124 x 3-a)] x 45-23 x 13 = 286

[52:(640-372-a)]x45-299=286

[52:(268-a)]x45=286+299

[52:(268-a)]x45=585

[52:(268-a)]=585:45

52:(268-a)=13

(268-a)=52:13

268-a=4

a=268-4

a=264

[(20+339:3+a:4) 7-5 400]:3 -22%3+125 x 8 = 1 000

[(20+113+a:4)ce semn este

[(64 x 33 x 2:4 – 500 x 2}:2+ 5x a] -6 x 12+999:9= 112

[(2112x2:4-1000) pune parantezele unde lipsesc