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Sagot :
Answer:
21a + 17b
Step-by-step explanation:
To simplify, we need to distribute the 9 to the terms inside of the parentheses that it is being multiplied by and 4 to the terms inside of the parentheses that it is being multiplied by like so:
9(a)+9(b)+4(3a)+4(2b)
9a+9b+12a+8b
Add like terms
21a + 17b
Step-by-step explanation:
first, multiply 9 with both a and b also 4 with 3a and 2b
second, collect the variables which means the a's together and the b's together
third, add the variables
finally, since different variables can not be added the answer will be 21a+17b
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