-9d = 63
you divide both side by -9
sooo...
d = -7
Answer:
n + 4
Step-by-step explanation:
It´s like a normal sum, but since the number is unknown just put n.
174 is equal to 174 if thats what the last one means
Step-by-step explanation:
Since there is 2 unknown variable ,
so we need 2 equation to find their values.
