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what is 3+7x-6x=9 ?

i just need help

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Roman C. | Masters of Education Graduate with Mathematics ExpertiseMasters of Education Graduate with Mathe...
4.9 4.9 (253 lesson ratings) (253)
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3 + 7x - 6x = 9

3 + x = 9      (combine like terms)

3 + x - 3 = 9 - 3  (subtract 3 from both sides)

x = 6   (on the left side, the 3 and -3 cancel)