Create Equations (Unknowns in terms of the same variable)

Write and solve equations for the word problems:

1. $2x+3(x-.45)=17.90, \quad\text{ Burger: } 3.85, \quad\text{ Fries: }3.40$
2. $2f+f+(f-.50)=7.70, \quad\text{ Burger: } 4.10, \quad\text{ Fries: }2.05, \quad \text{ Drink: }1.55$
3. $j+2j=116, \quad\text{ James: } 39 \text{ points}, \quad\text{ Richie: }78\text{ points}$
4. $r+3r+(3r+4)=235, \quad\text{ James: } 99 \text{ points}, \quad\text{ Richie: }33\text{ points}, \quad \text{ Naseeha: }103 \text{ points}$
5. $3b-5=47, \quad\text{ Bella: } 14 \text{ cards}$
6. $k+(4k+6)=76, \quad\text{ Khizar: } 14 \text{ points}, \quad\text{ Umar: }62\text{ points}$
7. $k+(k+8)+\dfrac{1}{2}k=38, \quad\text{ Kevin: } 12 \text{ questions}, \quad\text{ Anthony: }6\text{ questions}, \quad\text{ Dylan: } 20 \text{ questions}$
8. $k+(k+1)+(k-.85)+3(2)=3(7.05), \quad\text{ Kevin: } \$5, \quad\text{ Anthony: }\$4.15, \quad\text{ Dylan: } \$6$