The bill for a domestic power in a house is reduced from $120 to $90 per month. By what ratio has the bill been decreased?
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<h2><u>Expressions</u></h2><h3>Expand the expression 4(x - 3)</h3>
To expand an expression, apply distributive property.
- 4(x - 3)
- 4x - 12
<em>(See picture for better understanding)</em>
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