SOLUTION: The expression 2(a+b)=−8.1 for certain values of a and b. Find the value of the following expressions for the same values of a and b: 3(a+b)?

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Question 1103323: The expression 2(a+b)=−8.1 for certain values of a and b. Find the value of the following expressions for the same values of a and b: 3(a+b)?
Answer by algebrahouse.com(1659) About Me  (Show Source):
You can put this solution on YOUR website!
2(a + b) = -8.1
a + b = -4.05 {divided each side by 2}

3(a + b)
= 3(-4.05) {substituted -4.05 in for (a + b)}
= -12.15 {multiplied}

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