(2/5)(x-4)=(1/2)

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Solution for (2/5)(x-4)=(1/2) equation: 


x in (-oo:+oo)

(2/5)*(x-4) = 1/2 // - 1/2

(2/5)*(x-4)-(1/2) = 0

(2/5)*(x-4)-1/2 = 0

2/5*(x-4)-1/2 = 0

(2/5*2*(x-4))/2-1/2 = 0

2/5*2*(x-4)-1 = 0

4/5*x-21/5 = 0

(4/5*x-21/5)/2 = 0

(4/5*x-21/5)/2 = 0 // * 2

4/5*x-21/5 = 0

4/5*x-21/5 = 0 // + 21/5

4/5*x = 21/5 // : 4/5

x = 21/5/4/5

x = 21/4

x = 21/4

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