Issolvi 2*90^circ+(n-2)*120^circ=(2n-4)*90^circ

$$2 \times 90 ^ { \circ } + ( n - 2 ) \times 120 ^ { \circ } = ( 2 n - 4 ) \times 90 ^ { \circ }$$

Solvi għal n

$$n=5$$

Passi biex Issolvi l-Ekwazzjoni Lineari

Immultiplika 2 u 90 biex tikseb 180.

$$180+\left(n-2\right)\times 120=\left(2n-4\right)\times 90$$

Uża l-propjetà distributtiva biex timmultiplika n-2 b'120.

$$180+120n-240=\left(2n-4\right)\times 90$$

Naqqas 240 minn 180 biex tikseb -60.

$$-60+120n=\left(2n-4\right)\times 90$$

Uża l-propjetà distributtiva biex timmultiplika 2n-4 b'90.

$$-60+120n=180n-360$$

Naqqas 180n miż-żewġ naħat.

$$-60+120n-180n=-360$$

Ikkombina 120n u -180n biex tikseb -60n.

$$-60-60n=-360$$

Żid 60 maż-żewġ naħat.

$$-60n=-360+60$$

Żid -360 u 60 biex tikseb -300.

$$-60n=-300$$

Iddividi ż-żewġ naħat b'-60.

$$n=\frac{-300}{-60}$$

Iddividi -300 b'-60 biex tikseb5.

$$n=5$$