3n+10+c+5n-5=180

Add 3n and 5n.

8n+10+c-5=180

Subtract 5 from 10.

8n+c+5=180

8n+c+5=180

Subtract c from both sides of the equation.

8n+5=180-c

Subtract 5 from both sides of the equation.

8n=180-c-5

Subtract 5 from 180.

8n=-c+175

8n=-c+175

Divide each term in 8n=-c+175 by 8.

8n8=-c8+1758

Cancel the common factor of 8.

Cancel the common factor.

8n8=-c8+1758

Divide n by 1.

n=-c8+1758

n=-c8+1758

Move the negative in front of the fraction.

n=-c8+1758

n=-c8+1758

Solve for n 3n+10+c+5n-5=180