Distribute negative sign: We have the expression (9u+9)−(2u+3). The first step is to distribute the negative sign across the terms in the second parentheses.(9u+9)−(2u+3)=9u+9−2u−3
Combine like terms: Combine like terms by subtracting the coefficients of u and the constant terms separately.9u−2u+9−3=(9u−2u)+(9−3)=7u+6
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