Respuesta :

hnori22003

[tex]7x + 3 = 4x + 15[/tex]

Both sides minus 3

[tex]7x = 4x + 15 - 3[/tex]

[tex]7x = 4x + 12[/tex]

Both sides minus 4x

[tex]7x - 4x = 12[/tex]

[tex]3x = 12[/tex]

Divided both sides by 3

[tex]x = \frac{12}{3} \\ [/tex]

[tex]x = 4[/tex]

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