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paint express charge $30 per gallon of paint plus $1.10 per square foot of wall space. color creations charges $24 per gallon of paint plus $1.20 per square foot of wall space. robert estimates he will need four gallons of paint for the rooms he'd like painted. how much wall space would make paint express less expensive than color creations?"

  • math -

    30*4 + 1.1x < 24*4 + 1.2x.
    120 + 1.1x < 96 + 1.2x,
    1.1x - 1.2x < 96- 120,
    -0.1x < -24,
    X > 240 Sq Ft.

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