Question

решите очень надо а и б​

Answer 1

а)x=36/30÷12/15=36/30×15/12=3/2

б)x=(45×5)/9=25

Answer 2

х*1215=3630

х=3630:1215

х=3630*1512

х=32

б)45х=95

45*5=9х

9х=225

х=225:9

х=25