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Step-by-step explanation:

[tex]a. \frac{x}{4} - 3x = \frac{2}{5} \\ \\ \frac{x}{4} - \frac{12x}{4} = \frac{2}{5} \\ \\ \frac{ - 11x}{4} = \frac{2}{5} \\ \\ - 11x \times 5 = 4 \times 2 \\ - 55x = 8 \\ x = - \frac{55}{8} [/tex]

[tex]b. \frac{5y}{3} - 2y = \frac{1}{3} \\ \\ \frac{5y}{3} - \frac{6y}{3} = \frac{1}{3} \\ \\ - \frac{y}{3} = \frac{1}{3} \\ \\ - 3y = 3 \\ \\ y = \frac{3}{ - 3} \\ \\ y = - 1[/tex]