1) 94+x = 100 ==> x = 100-94 = 6
y/17 = 6 ==> y = 6*17 = 102
A = 43 + 3*6 + 3*102 = 43 + 18 + 306 = 367
2) 56-28/(x+2) = 54
28/(x+2) = 56-54 (l-am dus pe -28/(x+2) in partea dreapta si pe 54 in partea stanga cu semn schimbat)
28/(x+2) = 2
28 = 2*(x+2)
28 = 2x+4
24 = 2x
x = 12
(38+y)*3 = 168
38+y = 168/3
38+y = 56
y = 56 - 38 = 18
B= [152-5*(12+18)] = 152 - 5*30 = 152 - 150 = 2
3) 28*(x+235) = 6 860
x+235 = 6860/28
x+235 = 245
x = 10
y-37 = 13
y = 50
C= 300 - (5*50 - 3*10) = 300 - (250 - 30) = 300 - 220 = 80
