**Question: **Given the system of equations below, solve using any appropriate method:

3x + 6y = 21

-5x + y = 20

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**Question: **The sum of two numbers is twenty. Using *x* to represent the smaller of the two numbers, translate "the difference between two more than the larger number and twice the smaller number" into a variable expression. Then simplify.

**Question: **Solve: \[3\left[ 4-2\left( x-2 \right) \right]=3\left( 2-4x \right)\]

**Question: **Solve: \[\frac{7}{12}=\frac{2}{3}x+\frac{3}{4}\]

**Question: **Evaluate: \[{{\left( a-4b \right)}^{2}}\div {{c}^{3}}\] when \[a=4,\,\,b=-1,\,\,c=-2\]

**Question: **Simplify: \[3x+8\left( x-4 \right)-3\left( 2x-y \right)\]

**Question: **Simplify: \[5{{x}^{2}}-3x+\left( -2{{x}^{2}} \right)+3x\]

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