Respuesta :

2.1x - 10.05 = 3.15 - 6.7x <=> 2.1x + 6.7x = 3.15 + 10.05 <=>
<=> 8.8x = 13.2 => x = 13.2/8.8 => x = 1.5. 
The answer of 2.1x - 10.05 = 3.15 - 6.7x is 1.5