Question

Aflati termenul necunoscut din egalitatile:
a)5xa-317=198
b)415-400:(100-10xb)=410
va rog ajutati-ma

Answer 1

a)  5*a=198+317
     5*a = 515
      a = 515:5
      a = 103

b)  415-410=400:(100-10*b)
     5=400:(100-10*b)
     5*400=100-10*b
     2000 =  100-10*b
     2000-100=10b
1900=10b
b=1900:10
b=190

Answer 2

5-a=198+317 5-a=515 a=515-5 a=510 400:(100-10xb)=410+415 400:(100-10xb)=825 100-10xb=825x400 100-10xb=330000 10xb=330000+100 10xb=330100 b=330100:10 b=33010