-40=-21/4(x-20)

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Solution for -40=-21/4(x-20) equation: 


x in (-oo:+oo)

-40 = (-21/4)*(x-20) // - (-21/4)*(x-20)

-((-21/4)*(x-20))-40 = 0

(21/4)*(x-20)-40 = 0

21/4*(x-20)-40 = 0

21/4*(x-20)-40 = 0

21/4*x-145 = 0

21/4*x-145 = 0

21/4*x-145 = 0 // + 145

21/4*x = 145 // : 21/4

x = 145/21/4

x = 580/21

x = 580/21

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