(9+3)/4=((x+8)/8)+21

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Solution for (9+3)/4=((x+8)/8)+21 equation: 


x in (-oo:+oo)

(3+9)/4 = (x+8)/8+21 // - (x+8)/8+21

(3+9)/4-((x+8)/8)-21 = 0

(-1*(x+8))/8-21+3 = 0

(-1*(x+8))/8+(3*8)/8+(-21*8)/8 = 0

3*8-1*(x+8)-21*8 = 0

16-x-168 = 0

-x-152 = 0

(-x-152)/8 = 0

(-x-152)/8 = 0 // * 8

-x-152 = 0

-x-152 = 0 // + 152

-x = 152 // * -1

x = -152

x = -152

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