Step-by-step explanation:

Combine like terms on left hand side. Like terms are those which have the same base. Only coefficients of like terms can be added or subtracted.
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Transpose 2x to left hand side and change it's sign.
Similarly , Transpose 10 to right hand side and change it's sign.
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Divide both sides by 6
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Hope I helped ! ♡
Have a wonderful day / night ! ㋡
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I don't think I need to explain it, the answer is $111
your answer is....... 375/1000
21.33 is the answer because you have to multiply 64 times 1/3
Because it needs to for the correct formula