average monthly income of a family of 4 earning members was rs . 840 . one of the earning members died and therefore , the average income came down to rs 650 . the income of the deceased was ?
n0 = 4.0
n1 = 840.0
n2 = 650.0
t0 = n0 * n1
t1 = n0 - 1.0
t2 = n2 * t1
answer = t0 - t2
print(answer)