Datrys {l}{6.65A+2.705=806.10}{7A+S=202}

$$\left\{ \begin{array} { l } { 6.65 A + 2.705 = 806.10 } \\ { 7 A + S = 202 } \end{array} \right.$$

Datrys ar gyfer A, S

$$A = \frac{160679}{1330} = 120\frac{1079}{1330} \approx 120.811278195$$

$$S = -\frac{122299}{190} = -643\frac{129}{190} \approx -643.678947368$$

Camau Ateb

Ystyriwch yr hafaliad cyntaf. Tynnu 2.705 o'r ddwy ochr.

$$6.65A=806.1-2.705$$

Tynnu 2.705 o 806.1 i gael 803.395.

$$6.65A=803.395$$

Rhannu’r ddwy ochr â 6.65.

$$A=\frac{803.395}{6.65}$$

Ehangu \frac{803.395}{6.65} drwy luosi'r rhifiadur a'r enwadur gyda 1000.

$$A=\frac{803395}{6650}$$

Lleihau'r ffracsiwn \frac{803395}{6650} i'r graddau lleiaf posib drwy dynnu a chanslo allan 5.

$$A=\frac{160679}{1330}$$

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

$$7\times \frac{160679}{1330}+S=202$$

Lluosi 7 a \frac{160679}{1330} i gael \frac{160679}{190}.

$$\frac{160679}{190}+S=202$$

Tynnu \frac{160679}{190} o'r ddwy ochr.

$$S=202-\frac{160679}{190}$$

Tynnu \frac{160679}{190} o 202 i gael -\frac{122299}{190}.

$$S=-\frac{122299}{190}$$

Mae’r system wedi’i datrys nawr.

$$A=\frac{160679}{1330} S=-\frac{122299}{190}$$