Hey!
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Solve: 2/3m + a = a + r
Subtract a from both sides: a + 2/3 - a = a + r + -a
Simplify: 2/3m = r
Divide 2/3 to both sides: 2/3m/2/3 = r / 2/3
Simplify: m = 3r/2
Answer: m = 3r/2
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Hope This Helped! Good Luck!