Datrys {l}{a=3}{b=4}{x=5}{y={(x+a)}{(x+b)}}{text{Solvefor}ztext{where}}{z=y}

$$\left. \begin{array} { l } { a = 3 }\\ { b = 4 }\\ { x = 5 }\\ { y = {(x + a)} {(x + b)} }\\ { \text{Solve for } z \text{ where} } \\ { z = y } \end{array} \right.$$

Datrys ar gyfer a, b, x, y, z

$$z=72$$

Camau Ateb

Ystyriwch y pedwaredd hafaliad. Mewnosod y gwerthoedd sy’n hysbys i’r hafaliad.

$$y=\left(5+3\right)\left(5+4\right)$$

Adio 5 a 3 i gael 8.

$$y=8\left(5+4\right)$$

Adio 5 a 4 i gael 9.

$$y=8\times 9$$

Lluosi 8 a 9 i gael 72.

$$y=72$$

Ystyriwch y pumed hafaliad. Mewnosod y gwerthoedd sy’n hysbys i’r hafaliad.

$$z=72$$

Mae’r system wedi’i datrys nawr.

$$a=3 b=4 x=5 y=72 z=72$$