First, replace the numerator with the parentheses.
Second, multiply both sides by 3.
Third, multiply 2 × 3 to get 6.
Fourth, take away 15 from each side.
Fifth, simplify -6 - 15 to get -21.
Answer: n = -21
The side of a equilatoral triangle is 9.9 cm. find its perimetre
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First, replace the numerator with the parentheses.
Second, multiply both sides by 3.
Third, multiply 2 × 3 to get 6.
Fourth, take away 15 from each side.
Fifth, simplify -6 - 15 to get -21.
Answer: n = -21
SOLUTION
In this question, we are meant to expand the expression: