Answer: c=-6
Step-by-step explanation:
First let's subtract 4 from both sides
[tex]5c+4-4=-26-4\\5c=-30[/tex]
Now we can divide 5 on both sides
[tex]\frac{5c}{5} =\frac{-30}{5} \\c=-6[/tex]
We can sub -6 back in to the original equation to check the answer
[tex]5(-6)+4=-26\\-30+4=-26\\-26=-26[/tex]
It checks out!