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marcus101:
1. Simplify 5(x – 4) + 3x – 9x + 7.
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MidNiGhtSkY:
marcus you know how to do PEMDAS?
Shadow:
\[5(x – 4) + 3x – 9x + 7. \] Distribtue 5 to x and -4 \[5x - 20 + 3x - 9x + 7\] Like terms \[(5x + 3x - 9x) + (-20 + 7)\] \[(5x + 3x - 9x) = -x\] \[ (-20 + 7) = -13\] \[-x - 13\]
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