6x + 3x = 36
6x+ 3x = 9x
9x = 36
X= 4
$6 for each shirt
4 shirts for $24
$3 for each shirt
4 shirts for $12
24+ 12 = 36
Answer:

Step-by-step explanation:
solve for n so that m becomes the independent variable




Answer:
Fourth one
Step-by-step explanation:
Answer:
a
Step-by-step explanation:
hope this helps