Solve for x
x = \frac{9}{7} = 1\frac{2}{7} \approx 1.285714286
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7x-9=0
Combine 3x and 4x to get 7x.
7x=9
Add 9 to both sides. Anything plus zero gives itself.
x=\frac{9}{7}
Divide both sides by 7.
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