Datrys {l}{7/8b+1/4=1}{c=2}{text{Solvefor}dtext{where}}{d=c}

$$\left. \begin{array} { l } { \frac{7}{8} b + \frac{1}{4} = 1 }\\ { c = 2 }\\ { \text{Solve for } d \text{ where} } \\ { d = c } \end{array} \right.$$

Datrys ar gyfer b, c, d

$$d=2$$

Camau Ateb

Ystyriwch yr hafaliad cyntaf. Tynnu \frac{1}{4} o'r ddwy ochr.

$$\frac{7}{8}b=1-\frac{1}{4}$$

Tynnu \frac{1}{4} o 1 i gael \frac{3}{4}.

$$\frac{7}{8}b=\frac{3}{4}$$

Lluoswch y ddwy ochr â \frac{8}{7}, cilyddol \frac{7}{8}.

$$b=\frac{3}{4}\times \frac{8}{7}$$

Lluosi \frac{3}{4} a \frac{8}{7} i gael \frac{6}{7}.

$$b=\frac{6}{7}$$

Mae’r system wedi’i datrys nawr.

$$b=\frac{6}{7} c=2 d=2$$