(7x-12)-1/2(x-18)=42

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Solution for (7x-12)-1/2(x-18)=42 equation: 


x in (-oo:+oo)

7*x-((1/2)*(x-18))-12 = 42 // - 42

7*x-((1/2)*(x-18))-42-12 = 0

(-1/2)*(x-18)+7*x-42-12 = 0

7*x-1/2*(x-18)-42-12 = 0

7*x-1/2*(x-18)-42-12 = 0

13/2*x-42-12+9 = 0

13/2*x-33-12 = 0

13/2*x-45 = 0

13/2*x-45 = 0

13/2*x-45 = 0 // + 45

13/2*x = 45 // : 13/2

x = 45/13/2

x = 90/13

x = 90/13

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