4 - 9c - 12 + 3c = 22

Explanation:

Step1: Combine like - terms

$(4 - 12)+(-9c + 3c)=22$ $-8-6c = 22$

Step2: Isolate the term with the variable

Add 8 to both sides of the equation: $-8-6c+8 = 22 + 8$ $-6c=30$

Step3: Solve for c

Divide both sides by - 6: $\frac{-6c}{-6}=\frac{30}{-6}$ $c=-5$

Answer:

$c = - 5$