(5+a)/4=7

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Solution for (5+a)/4=7 equation: 


a in (-oo:+oo)

(a+5)/4 = 7 // - 7

(a+5)/4-7 = 0

(a+5)/4+(-7*4)/4 = 0

a-7*4+5 = 0

a-23 = 0

(a-23)/4 = 0

(a-23)/4 = 0 // * 4

a-23 = 0

a-23 = 0 // + 23

a = 23

a = 23

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