Keep doing each step manually, and see where it slips up:
−7.9+8.2−3.4+2.1=−1
−7.9+8.2+(−3.4)+2.1=−1
−7.9+(−3.4)+8.2+2.1=−1
(−7.9+(−3.4))+(8.2+2.1)=−1
−11.3+10.3=−1
120 percent=120/100=60/50=30/25=6/5, So it simplifies to 6/5.
Answer: 8n
Step-by-step explanation: 5n + 3n
Given the differential equation

The solution is as follows:
4/156 so
2/78 so
1/39 so approx. 2.5641%