Datrys {l}{A=9-4+(6-11)-(-8+3-2)}{B=-16-(7-15+4)-(-5+12)}{C=7-5+(2-3)-(-7+5-3)}

$$\left. \begin{array} { l } { A = 9 - 4 + ( 6 - 11 ) - ( - 8 + 3 - 2 ) } \\ { B = - 16 - ( 7 - 15 + 4 ) - ( - 5 + 12 ) } \\ { C = 7 - 5 + ( 2 - 3 ) - ( - 7 + 5 - 3 ) } \end{array} \right.$$

Datrys ar gyfer A, B, C

$$A=7$$

$$B=-19$$

$$C=6$$

Camau Ateb

Ystyriwch yr hafaliad cyntaf. Tynnu 4 o 9 i gael 5.

$$A=5+6-11-\left(-8+3-2\right)$$

Adio 5 a 6 i gael 11.

$$A=11-11-\left(-8+3-2\right)$$

Tynnu 11 o 11 i gael 0.

$$A=0-\left(-8+3-2\right)$$

Adio -8 a 3 i gael -5.

$$A=0-\left(-5-2\right)$$

Tynnu 2 o -5 i gael -7.

$$A=0-\left(-7\right)$$

Gwrthwyneb -7 yw 7.

$$A=0+7$$

Adio 0 a 7 i gael 7.

$$A=7$$

Ystyriwch yr ail hafaliad. Tynnu 15 o 7 i gael -8.

$$B=-16-\left(-8+4\right)-\left(-5+12\right)$$

Adio -8 a 4 i gael -4.

$$B=-16-\left(-4\right)-\left(-5+12\right)$$

Gwrthwyneb -4 yw 4.

$$B=-16+4-\left(-5+12\right)$$

Adio -16 a 4 i gael -12.

$$B=-12-\left(-5+12\right)$$

Adio -5 a 12 i gael 7.

$$B=-12-7$$

Tynnu 7 o -12 i gael -19.

$$B=-19$$

Ystyriwch y trydydd hafaliad. Tynnu 5 o 7 i gael 2.

$$C=2+2-3-\left(-7+5-3\right)$$

Adio 2 a 2 i gael 4.

$$C=4-3-\left(-7+5-3\right)$$

Tynnu 3 o 4 i gael 1.

$$C=1-\left(-7+5-3\right)$$

Adio -7 a 5 i gael -2.

$$C=1-\left(-2-3\right)$$

Tynnu 3 o -2 i gael -5.

$$C=1-\left(-5\right)$$

Gwrthwyneb -5 yw 5.

$$C=1+5$$

Adio 1 a 5 i gael 6.

$$C=6$$

Mae’r system wedi’i datrys nawr.

$$A=7 B=-19 C=6$$