Distribute on the left
-10-12m+16=-90
Combine like terms
-12m+6=-90
Subtract 6 from both sides
-12m=-96
Divide both sides by -12
m=8
Final answer: m=8
You can substitute 20 + d for c in the first equation which gives you
20+ d = 100 - d then solve
2d = 80
d= 40
then put the value for d back into one of the original equations
c= 20 + d
c = 20 + (40)
c = 60
Answer:
5 units
Step-by-step explanation:
It’s a expression of a rate in a quantity of one.