1. $$ 4 x+7=15 $$ 2. $$ 3 x-10=17 $$ 3. $$ 5 x+8=11 $$ 4. $$ 2 x+13=8 $$

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1. **Solve $$ 4x+7=15 $$:**
   - Subtract $$ 7 $$ from both sides:
     $$
     4x = 15 - 7 = 8
     $$
   - Divide both sides by $$ 4 $$:
     $$
     x = \frac{8}{4} = 2
     $$

2. **Solve $$ 3x-10=17 $$:**
   - Add $$ 10 $$ to both sides:
     $$
     3x = 17 + 10 = 27
     $$
   - Divide both sides by $$ 3 $$:
     $$
     x = \frac{27}{3} = 9
     $$

3. **Solve $$ 5x+8=11 $$:**
   - Subtract $$ 8 $$ from both sides:
     $$
     5x = 11 - 8 = 3
     $$
   - Divide both sides by $$ 5 $$:
     $$
     x = \frac{3}{5}
     $$

4. **Solve $$ 2x+13=8 $$:**
   - Subtract $$ 13 $$ from both sides:
     $$
     2x = 8 - 13 = -5
     $$
   - Divide both sides by $$ 2 $$:
     $$
     x = \frac{-5}{2} = -\frac{5}{2}
     $$
1. $$ x = 2 $$ 2. $$ x = 9 $$ 3. $$ x = \frac{3}{5} $$ 4. $$ x = -\frac{5}{2} $$

1. \( 4 x+7=15 \) 2. \( 3 x-10=17 \) 3. \( 5 x+8=11 \) 4. \( 2 x+13=8 \)

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