21/4y+7-12/4y=-2

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Solution for 21/4y+7-12/4y=-2 equation: 


y in (-oo:+oo)

(21/4)*y-((12/4)*y)+7 = -2 // + 2

(21/4)*y-((12/4)*y)+2+7 = 0

(21/4)*y-3*y+2+7 = 0

9/4*y+9 = 0 // - 9

9/4*y = -9 // : 9/4

y = -9/9/4

y = -4

y = -4

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