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(1/5)*x+5 = 7*x-9/5 // - 7*x-9/5
(1/5)*x-(7*x)-(-9/5)+5 = 0
(1/5)*x-7*x+9/5+5 = 0
34/5-34/5*x = 0 // - 34/5
-34/5*x = -34/5 // : -34/5
x = -34/5/(-34/5)
x = 1
x = 1
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