Answer:
first you would distribute so multply 5 to c and d an dthen multply 2 to 4c and 2d
5c+5d=8c+4d
now we can subtract 4d from both sides
5c+d=8c
and subtract 5c from both sides
d=3c this is what your left with so this is your answer
Step-by-step explanation:
13c + 9d
-19 ½
6 × -3 = -18
½ × -3 = -1 ½
-18 + -1 ½ = -19 ½
I believe it is c