ANSWER:
Paul earns $60 for cutting grass.
Paul earns $120 for painting rooms.
STEP-BY-STEP EXPLANATION:
Let x be the money Paul earns cutting grass.
We can establish the following equation with the help of the statement:
[tex]\begin{gathered} \text{Paul, painting rooms = 2x} \\ \text{Megan babysitting = 1/4 }\cdot\text{ 2x} \\ \text{therefore:} \\ \text{ painting rooms + cutting grass = \$150 + babysitting } \\ \text{ replacing:} \\ 2x+x=150+\frac{1}{4}2x \\ 3x=150+\frac{1}{2}x \\ 3x-\frac{1}{2}x=150 \\ \frac{5}{2}x=150 \\ x=\frac{2}{5}\cdot150 \\ x=60 \\ \text{then,} \\ \text{Paul, cutting grass = \$60} \\ \text{Paul, painting rooms = \$120} \end{gathered}[/tex]