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379=5x+6(-7x+20)
We move all terms to the left:
379-(5x+6(-7x+20))=0
We calculate terms in parentheses: -(5x+6(-7x+20)), so:We get rid of parentheses
5x+6(-7x+20)
We multiply parentheses
5x-42x+120
We add all the numbers together, and all the variables
-37x+120
Back to the equation:
-(-37x+120)
37x-120+379=0
We add all the numbers together, and all the variables
37x+259=0
We move all terms containing x to the left, all other terms to the right
37x=-259
x=-259/37
x=-7
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