Answer:
c=-1.937743f+4.937743
Explanation:
Let's solve for c.
2.57c+4.98f=12.69
Step 1: Add -4.98f to both sides.
2.57c+4.98f+−4.98f=12.69+−4.98f
2.57c=−4.98f+12.69
Step 2: Divide both sides by 2.57.
2.57c/2.57=-4.98f+12.69/2.57
c=-1.937743f+4.937743