Atrisiniet r=3a*3(5ab)=

$$r = 3 a \cdot 3 ( 5 a b ) =$$

Atrast b

$$\left\{\begin{matrix}b=\frac{r}{45a^{2}}\text{, }&a\neq 0\\b\in \mathrm{R}\text{, }&r=0\text{ and }a=0\end{matrix}\right,$$

Lineāra vienādojuma risināšanas darbības

Reiziniet a un a, lai iegūtu a^{2}.

$$r=3a^{2}\times 3\times 5b$$

Reiziniet 3 un 3, lai iegūtu 9.

$$r=9a^{2}\times 5b$$

Reiziniet 9 un 5, lai iegūtu 45.

$$r=45a^{2}b$$

Mainiet puses tā, lai visi mainīgie locekļi atrastos pa kreisi.

$$45a^{2}b=r$$

Daliet abas puses ar 45a^{2}.

$$\frac{45a^{2}b}{45a^{2}}=\frac{r}{45a^{2}}$$

Dalīšana ar 45a^{2} atsauc reizināšanu ar 45a^{2}.

$$b=\frac{r}{45a^{2}}$$

Atrast a

$$\left\{\begin{matrix}a=\frac{\sqrt{\frac{5r}{b}}}{15}\text{; }a=-\frac{\sqrt{\frac{5r}{b}}}{15}\text{, }&\left(r\geq 0\text{ and }b>0\right)\text{ or }\left(r\leq 0\text{ and }b<0\right)\\a\in \mathrm{R}\text{, }&r=0\text{ and }b=0\end{matrix}\right,$$