Question

afla numarul necunoscut 
60*10-a=435 
c+3*10=705 
800:100-e=0 
b-17*10=523 
270:10+d+529
f-560:10=109

Answer 1

60 * 10 - a = 435
600 - a = 435
-a = 435 - 600
-a = -165
a = 165

c+3 * 10 = 705
c + 30 = 705
c = 705 - 30
c = 675

800 / 100 - e = 0
8 - e = 0
-e = -8
e = 8

b - 17 * 10 = 523
b - 170 = 523
b = 523 + 170
b = 693

...

f - 560 / 10 = 109
f - 56 = 109
f = 109 + 56
f = 165