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Simplify the following expression.

(7.9x+8.9)-(-4.34x+3.31
A.
12.24x+12.21
B.
3.56x+12.21
C.
3.56x+5.59
D.

12.24x+5.59

1 answer

To simplify the expression \((7.9x + 8.9) - (-4.34x + 3.31)\), follow these steps:

  1. Distribute the negative sign across the second part of the expression: \[ (7.9x + 8.9) + (4.34x - 3.31) \]

  2. Combine the \(x\) terms: \[ 7.9x + 4.34x = 12.24x \]

  3. Combine the constant terms: \[ 8.9 - 3.31 = 5.59 \]

  4. Therefore, the simplified expression is: \[ 12.24x + 5.59 \]

The answer is: D. \(12.24x + 5.59\)