r/10+4=5
r/10=5-4 (Sent 4 to the other side of the equation, therefore it became a negative 4)
r/10=1 (As 5-4=1)
r=10 (Multiplied both sides of the equation by 10 in order to isolate "r")
It's just a variable in a problem. You solve for ex . So whatever your answer is you equal to x.
Answer:
Step-by-step explanation:
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