Buns and toasts

Two buns weigh 10 grams more than two toasts. One Bun and two Toast weigh a total of 110 grams. How many grams weigh three toasts? How many grams does a Bun weigh?

Final Answer:

a =  105 g
h =  40 g

Step-by-step explanation:

$$\begin{gathered} 2\cdot h=10+2\cdot t \\ h+2\cdot t=110 \\ 2h-2t=10 \\ h+2t=110 \\ Row2-\frac{1}{2}\cdot Row1\to Row2 \\ 3t=105 \\ t=\frac{105}{3}=35 \\ h=\frac{10+2t}{2}=\frac{10+2\cdot 35}{2}=40 \\ h=40 \\ t=35 \\ a=3\cdot t=3\cdot 35=105\text{g} \end{gathered}$$

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