3(90-x)=180-x/3

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Solution for 3(90-x)=180-x/3 equation: 


x in (-oo:+oo)

3*(90-x) = 180-(x/3) // - 180-(x/3)

3*(90-x)+x/3-180 = 0

(3^2*(90-x))/3+x/3+(-180*3)/3 = 0

3^2*(90-x)+x-180*3 = 0

810-8*x-540 = 0

270-8*x = 0

(270-8*x)/3 = 0

(270-8*x)/3 = 0 // * 3

270-8*x = 0

270-8*x = 0 // - 270

-8*x = -270 // : -8

x = -270/(-8)

x = 135/4

x = 135/4

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