Respuesta :

Willchemistry
[tex]x+ \frac{x}{7} +(x+ \frac{x}{7} )=60[/tex]

Remove parentheses (a)= a

[tex]x+ \frac{x}{7} +x+ \frac{x}{7} [/tex]

Group like terms:

[tex]x+ \frac{x}{7} +x+x[/tex]

Add similar elements:

[tex] \frac{x}{7} + \frac{x}{7} =2 \frac{x}{7} [/tex]

[tex]= 2 \frac{x}{7} +x+x[/tex]

Add similar elements:

[tex]x+x = 2x[/tex]

[tex]2 \frac{x}{7} +2x[/tex]

Multiply [tex]2 \frac{x}{7} [/tex]

[tex]= \frac{2x}{7} +2x[/tex]

[tex] \frac{2x}{7} +2x = 60[/tex]

Multiply both sides by 7 :

[tex] \frac{2x}{7} *7+2x*7 = 60*7[/tex]

[tex]16x = 420[/tex]

[tex]x = 420 / 16[/tex]

[tex]x = \frac{105}{4} [/tex]

hope this helps!

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