Answer:
or 5.75
Explanation:
Step 1. Simplify 21 + 30 to 51
51 = −4c + 28
Step 2. Subtract 28 from both sides
51 - 28 = -4c
Step 3. Simplify 51 - 28 to 23
23 = -4c
Step 4. Divide both sides by -4
= c
Step 5. Switch sides
c =
![-(23)/(4)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/5w9fl27thtgxfiq5w7jzsjvivubhlxdmva.png)
Decimal Form Answer: -5.75
I hope this helps you out.