Answer:
5m/s²
Step-by-step explanation
100N and 80N of forces act in the same direction so we will add them together
100N + 80N = 180N
while 30N force act in opposite direction so we will have to subtract
180N – 30N = 150N
force = 150N
mass = 30 kg
acceleration = ?
using the formula
f = m × a


I hope this helps