13=-3(2x+2)7x

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Solution for 13=-3(2x+2)7x equation: 



13=-3(2x+2)7x

We move all terms to the left:

13-(-3(2x+2)7x)=0



We calculate terms in parentheses: -(-3(2x+2)7x), so:

-3(2x+2)7x

We multiply parentheses

-42x^2-42x

Back to the equation:

-(-42x^2-42x)



We get rid of parentheses

42x^2+42x+13=0

a = 42; b = 42; c = +13;
Δ = b2-4ac
Δ = 422-4·42·13
Δ = -420
Delta is less than zero, so there is no solution for the equation

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