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4*x = 7-((91/9)*x)-100 // - 7-((91/9)*x)-100
4*x+(91/9)*x-7+100 = 0
127/9*x+93 = 0 // - 93
127/9*x = -93 // : 127/9
x = -93/127/9
x = -837/127
x = -837/127
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