Respuesta :

Answer:

1. 12x

2. -7 + 12x

Step-by-step explanation:

1. 2(5x + x)

(multiply inside od parenthesis by outside)

10x + 2x

(add like terms)

12x

2. -7 + 3x + 9x

(add like terms)

-7 + 12x

Answer:

1. 12x

2. 12x-7

Step-by-step explanation:

1. distribute the 2 to both terms to get 10x+2x then add those together to get 12x    OR    add 5x to x to get 6x then distribute the (multiply by) 2 to get 12x

2. combine 3x and 9x to get 12x then write -7 to get 12x-7

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