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Evaluate the expression. {:[a=8quad b=4],[ab+2b-3a]:}

Evaluate the expression.\newlinea=8b=4ab+2b−3a \begin{array}{c} a=8 \quad b=4 \\ a b+2 b-3 a \end{array}

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Full solution

Q. Evaluate the expression.\newlinea=8b=4ab+2b−3a \begin{array}{c} a=8 \quad b=4 \\ a b+2 b-3 a \end{array}
  1. Substitute values: Substitute the values of aa and bb into the expression.\newlineab+2b−3a=(8)(4)+2(4)−3(8)ab + 2b - 3a = (8)(4) + 2(4) - 3(8)
  2. Perform multiplication: Perform the multiplication. 32+8−2432 + 8 - 24
  3. Add and subtract: Add and subtract the numbers. 32+8=4032 + 8 = 40, 40−24=1640 - 24 = 16

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