Solve for x
x=\frac{4}{7}\approx 0.571428571
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9x-4-2x=0
Subtract 2x from both sides.
7x-4=0
Combine 9x and -2x to get 7x.
7x=4
Add 4 to both sides. Anything plus zero gives itself.
x=\frac{4}{7}
Divide both sides by 7.
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