a/4-2a/5=-9/2

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Solution for a/4-2a/5=-9/2 equation: 


a in (-oo:+oo)

a/4-((2*a)/5) = -9/2 // + -9/2

a/4-((2*a)/5)-(-9/2) = 0

a/4+(-2/5)*a+9/2 = 0

9/2-3/20*a = 0 // - 9/2

-3/20*a = -9/2 // : -3/20

a = -9/2/(-3/20)

a = 30

a = 30

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