Answer:
4x+48
Explanation:
You times 4 by x and 12. 4 times 12 gives you 48. 4 times x is combined so you get 4x. Since it is addition you write it our as 4x+48.
4x + 48
4(x + 12)
= 4*x + 4*12
= 4x + 48
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