$\phantom{=}\dfrac13\blueD a-1-\dfrac12\goldD b$empty space, start fraction, 1, divided by, 3, end fraction, start color #11accd, a, end color #11accd, minus, 1, minus, start fraction, 1, divided by, 2, end fraction, start color #e07d10, b, end color #e07d10

$= \dfrac13 \cdot \blueD {12}-1-\dfrac12 \cdot \goldD 6~~~~~~~~\text{Замените }\blueD{a} \text{ са } \blueD{12}\text{ и } \goldD b \text{ са } \goldD 6\text{.}$equals, start fraction, 1, divided by, 3, end fraction, dot, start color #11accd, 12, end color #11accd, minus, 1, minus, start fraction, 1, divided by, 2, end fraction, dot, start color #e07d10, 6, end color #e07d10, space, space, space, space, space, space, space, space, start text, З, а, м, е, н, и, т, е, space, end text, start color #11accd, a, end color #11accd, start text, space, с, а, space, end text, start color #11accd, 12, end color #11accd, start text, space, и, space, end text, start color #e07d10, b, end color #e07d10, start text, space, с, а, space, end text, start color #e07d10, 6, end color #e07d10, start text, point, end text

$=4 - 1 - 3$equals, 4, minus, 1, minus, 3

$=0$equals, 0