thiaaleGDpku3m thiaaleGDpku3m

01-12-2016
Mathematics

contestada

solve |x + 7| = 12

a. {-19, -5}

b. {-5,19}

c. {-19,5}

d.{5,19}

Respuesta :

apologiabiology apologiabiology

01-12-2016

for
|a|=b
assume
a=b and a=-b

|x+7|=12

assume
x+7=12 and x+7=-12
minus 7 both sides
x=5 and x=-19

C is answer

Answer Link

wizard123 wizard123

01-12-2016

When solving absolute value equations, you must account for both the positive and negative cases.

x+7 = 12 AND x+7 = -12
x = 5 x = -19

Answer Link

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