Respuesta :

alexanderperezii
2 [ ( 12 + 2x) + ( 15 + 2x) ] = 74

Divide 2 by both sides.

[ ( 12 + 2x) + ( 15 + 2x) ] = 37

Add the equations in the parentheses.

(27 + 4x) = 37

Remove parentheses.

27 + 4x = 37

Subtract 27 by both sides.

4x = 10

Divide 4 by both sides.

x = 10/4 or 2.5

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