Question

a). (3x+1):5+3=5
Alguien que me ayude en esas ?
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Answer 1

Respuesta:

B)

(3x + 1) : 5 + 3 = 5

$\frac{3x + 1 + 15}{5} = 5\\\\3x + 16 = 5 * 5\\\\3x+16 = 25\\\\3x = 25 -16\\ \\3x = 9\\\\x = 9/3\\x = 3$

Comprobación

(3x + 1): 5 + 3 = 5

(3(3) + 1): 5 + 3 = 5

(9 + 1): 5 + 3 = 5

10 : 5 + 3 = 5

2 + 3 = 5

5 = 5

C)

$\sqrt{3x-2} = 5\\\\(\sqrt{3x-2} )^2 = (5)^2\\\\3x - 2 = 25\\\\3x = 25 + 2\\\\3x = 27\\\\x = 27/3\\x = 9$

Comprobación

$\sqrt{3x-2} = 5\\\\\sqrt{3(9) - 2} = 5\\\\\sqrt{27 - 2} = 5\\\\\sqrt{25} = 5\\\\5 = 5$

D)

$(2x+3)^3 = -125\\\\\sqrt[3]{(2x + 3)^3} = \sqrt[3]{-125}\\\\2x + 3 = -5\\\\2x = -5 - 3\\\\2x = -8\\\\x = -8/2\\x = -4$

Comprobación

$(2x + 3)^3 = -125\\\\(2(-4)+3)^3 =-125\\\\(-8 +3)^3 = -125\\\\(-5)^3 = -125\\\\-125 = -125$

Explicación paso a paso: