1. Solve the following equations for x:

1. $2x + 5 = 10 $
2. $-3x - 10 = 20$
3. $3x + 5 = -2x + 15$
4. $5x - 7 = 11x - 19 $

2. Draw pictures that represent the following problems (and solve them):

1. $-5 + 7 = $
2. $6 - 11 = $
3. $2\cdot 9 = $
4. $5.3 \cdot 2.7 = $
5. $\frac{2}{3} + \frac{4}{5} = $

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