7.5=(x+3)/2

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Solution for 7.5=(x+3)/2 equation: 


x in (-oo:+oo)

7.5 = (x+3)/2 // - (x+3)/2

7.5-((x+3)/2) = 0

(-1*(x+3))/2+7.5 = 0

(-1*(x+3))/2+(2*7.5)/2 = 0

2*7.5-1*(x+3) = 0

12-x = 0

(12-x)/2 = 0

(12-x)/2 = 0 // * 2

12-x = 0

12-x = 0 // - 12

-x = -12 // * -1

x = 12

x = 12

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