( x+x+3,4x+3,4x-0,4):4=5,02

(8,8x-0,4):4=5,02
2,2x-0,1=5,02
2,2x=5,02+0,1
2,2x=5,12
x=5,12:2,2
x=2 18/55

(x + x + 3,4x + 3,4x - 0,4) : 4 = 5,02; 8,8х - 0,4 = 5,02 * 4; 8,8х - 0,4 = 20,08; 8,8х = 20,08 + 0,4; 8,8х = 20,48; х = 20,48 : 8,8; х = 2048 : 880; х = 2 288/880; х = 2 72/220; х = 2 36/110; х = 2 18/55.