(X-7)/5=(x-8)/4

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Solution for (X-7)/5=(x-8)/4 equation: 


x in (-oo:+oo)

(X-7)/5 = (x-8)/4 // - (x-8)/4

(X-7)/5-((x-8)/4) = 0

(X-7)/5+(-1*(x-8))/4 = 0

(4*(X-7))/(4*5)+(-1*5*(x-8))/(4*5) = 0

4*(X-7)-1*5*(x-8) = 0

4*X-5*x+12 = 0

(4*X-5*x+12)/(4*5) = 0

(4*X-5*x+12)/(4*5) = 0 // * 4*5

4*X-5*x+12 = 0

4*X-5*x+12 = 0 // - 4*X+12

-5*x = -(4*X+12) // : -5

x = (-(4*X+12))/(-5)

x = (4*X+12)/5

x = (4*X+12)/5

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