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(7/9)*x-2 = (2/3)*x // - (2/3)*x
(7/9)*x-((2/3)*x)-2 = 0
(7/9)*x+(-2/3)*x-2 = 0
1/9*x-2 = 0 // + 2
1/9*x = 2 // : 1/9
x = 2/1/9
x = 18
x = 18
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