Of course it is because the rate of the rent dose not change with the time is changing
Hello!

First we will get the variable in the correct side.
add 4c to 7c.
Second thing you will do is subtract 12 from 78
Now, divide 66 by 11 and you'll be left with c=6
Answer:
the answer is C. or (3,-4) i am pretty sure it is,if my calculations are correct,
Step-by-step explanation:
brainliest please
1.) -21
2.) 5
3.) -20
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Subtract 4 from both sides. You'll get 8x = 28. Solving for x, x = 28/8 = 7/2