Answer:
y=4
Step-by-step explanation:
13-9=4
13-4=y
y+9=13
4+9=13
---------------------------------------------
13-y=9
Subtract 13 from both sides:
13-y-13= 9-13
Simplify:
-y= -4
Divide both sides by -1:
-y/-1= -4/-1
Your Answer Is y=4
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