Respuesta :

dasetka
a - 4 + 7a + 11   Rearrange the expression and put like terms next to each other
a + 7a - 4 + 11   Combine like terms (a and 7a) (-4 and 11)*
 
    8a + 7

* If it helps to combine a negative and positive number, you can switch them!    -4 + 11 is the same as 11 - 4.
Just be sure to keep the signs with the right number.
1212wolf
it becomes 8a because you add the 7a and the lone a together and 7 because 11 -4 is basically 11+-4 so your equation is 8a+7

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