Issolvi (20-x)*1.5+(30+1.5x)*1.2=69

$$(20-x) \times 1.5+(30+1.5x) \times 1.2=69$$

Solvi għal x

$$x=10$$

Passi biex Issolvi l-Ekwazzjoni Lineari

Uża l-propjetà distributtiva biex timmultiplika 20-x b'1.5.

$$30-1.5x+\left(30+1.5x\right)\times 1.2=69$$

Uża l-propjetà distributtiva biex timmultiplika 30+1.5x b'1.2.

$$30-1.5x+36+1.8x=69$$

Żid 30 u 36 biex tikseb 66.

$$66-1.5x+1.8x=69$$

Ikkombina -1.5x u 1.8x biex tikseb 0.3x.

$$66+0.3x=69$$

Naqqas 66 miż-żewġ naħat.

$$0.3x=69-66$$

Naqqas 66 minn 69 biex tikseb 3.

$$0.3x=3$$

Iddividi ż-żewġ naħat b'0.3.

$$x=\frac{3}{0.3}$$

Espandi \frac{3}{0.3} billi timmultiplika kemm in-numeratur kif ukoll id-denominatur b'10.

$$x=\frac{30}{3}$$

Iddividi 30 b'3 biex tikseb10.

$$x=10$$