let the number of toys of Kyle be X.
let the number of toys of brain be Y
X + Y = 154..........(1)
X = y + 34............(2)
putting the value of X in equation 1, we get:-
Y+ 34 + Y = 154
2Y + 34 = 154
2Y = 154 - 34
2Y = 120
Y = 60
now putting the value of Y in equation 2 we get:-
X = 60 + 34
X = 94
Kyle have 94 toys while Brain have 60 toys