4-1/3(21x-12)=20

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Solution for 4-1/3(21x-12)=20 equation: 


x in (-oo:+oo)

4-((1/3)*(21*x-12)) = 20 // - 20

4-((1/3)*(21*x-12))-20 = 0

(-1/3)*(21*x-12)-20+4 = 0

4-1/3*(21*x-12)-20 = 0

4-1/3*(21*x-12)-20 = 0

4-7*x-16 = 0

-7*x-12 = 0

-7*x-12 = 0

-7*x-12 = 0 // + 12

-7*x = 12 // : -7

x = 12/(-7)

x = -12/7

x = -12/7

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