Two friends are pushing a stalled 1610 kg car. The first pushes with a 107 N forward force. The car accelerates at 0.123 m/s. How much force does the second person exert?

Answer 1

The total force exerted
F = ma = 1610*0.123 = 198
So now just subtract the 107 given

Answer 2

Or:
F1+F2 = M*a.
107+F2 = 1610 * 0.123.
F2 = ?.