3x+5=-7x-15

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Solution for 3x+5=-7x-15 equation: 


x in (-oo:+oo)

3*x+5 = -7*x-15 // + -7*x-15

3*x-(-7*x)+5+15 = 0

3*x+7*x+5+15 = 0

10*x+20 = 0 // - 20

10*x = -20 // : 10

x = -20/10

x = -2

x = -2

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