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(-4/9)*x+1/3 = -7 // + 7
(-4/9)*x+1/3+7 = 0
22/3-4/9*x = 0 // - 22/3
-4/9*x = -22/3 // : -4/9
x = -22/3/(-4/9)
x = 33/2
x = 33/2
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