a)
[tex]9.3 = 2 \times x + 3.25[/tex]
[tex]6.05 = 2 \times x[/tex]
[tex]3.025 = x[/tex]
b)
[tex]2.5 \times \frac{3 \times x}{1} = 20[/tex]
[tex]2.5 \times 3 \times x = 20[/tex]
[tex]7.5 \times x = 20[/tex]
[tex]x = 2.(6)[/tex]
c)
[tex] \frac{3 \times x}{1.84} = 9.8[/tex]
[tex]3 \times x = 18.032[/tex]
[tex]x = 6.010(6)[/tex]
