Question

afla: Z+15-4×75:3=300. [(b+27)×2-325]×3=1047​

Answer 1

• Z+15-4·75:3=300

Z+15-100=300

Z+15=300+100=400

Z=400-15

Z=385

• [(b+27)·2-325]·3=1047

(b+27)·2-325=1047:3=349

(b+27)·2=349+325=674

b+27=674:2=337

b=337-27

b=310

Answer 2

Răspuns:

Explicație pas cu pas:

z + 15 - 4 × 75 : 3 = 300

z + 15 - 300 : 3 = 300

z + 15 - 100 = 300

z = 300 + 100 - 15 → aplic metoda mersului invers

z = 400 - 15

z = 385

__________________________

[ ( b + 27 ) × 2 - 325 ] × 3 = 1 047

​( b + 27 ) × 2 - 325 = 1 047 : 3

( b + 27 ) × 2 - 325 = 349

( b + 27 ) × 2 = 349 + 325

( b + 27 ) × 2 = 674

b + 27 = 674 : 2

b + 27 = 337

b = 337 - 27

b = 310