book Maths Puzzle Numerical Ability

Using the Distributive property what would .... 2(4+t) be?

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This question is on elimination...and it is also my last question... i just wanted you to check my answers to make sure that they were right.
-1/3x-4/3y=-2
1/3x-2/3y=4

My answer was (4,-4) Is this right?
thank you so so much!~ how do you solve 2000=.75b-10000=.30p
(profit =income - expenses)