4+a+2a=19

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Solution for 4+a+2a=19 equation: 


a in (-oo:+oo)

a+2*a+4 = 19 // - 19

a+2*a-19+4 = 0

3*a-15 = 0 // + 15

3*a = 15 // : 3

a = 15/3

a = 5

a = 5

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