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Question Number 122760 by mulindwahakiim last updated on 19/Nov/20

$$3x+y=6$$$$x-5y=12$$

Commented by MJS_new last updated on 19/Nov/20

$$\mathrm{seriously}?\mathrm{what}\mathrm{is}\mathrm{it}\mathrm{you}{\mathrm{don}}^{\prime }\mathrm{t}\mathrm{understand}?$$

Answered by bemath last updated on 19/Nov/20

$$\left(\begin{array}{c}31\\ 1-5\end{array}\right)\left(\begin{array}{c}x\\ y\end{array}\right)=\left(\begin{array}{c}6\\ 12\end{array}\right)$$$$\mathrm{\Delta }=-16,{\mathrm{\Delta }}_x=\left|\begin{array}{c}61\\ 12-5\end{array}\right|=-42$$$${\mathrm{\Delta }}_y=\left|\begin{array}{c}36\\ 1-5\end{array}\right|=-21$$$$\to \{\begin{array}{l}x=\frac{{\mathrm{\Delta }}_x}{\mathrm{\Delta }}=\frac{42}{16}=\frac{21}{8}\\ y=\frac{{\mathrm{\Delta }}_y}{\mathrm{\Delta }}=\frac{21}{16}\end{array}$$

Commented by MJS_new last updated on 19/Nov/20

$$\mathrm{yes}\mathrm{but}\mathrm{do}\mathrm{you}\mathrm{believe}\mathrm{this}\mathrm{will}\mathrm{help}\mathrm{this}\mathrm{person}?$$

Commented by bemath last updated on 19/Nov/20

$$hahaha....i{don}^{\prime }tknowsir..$$

Commented by bemath last updated on 19/Nov/20

$$mybeheisjustkidding$$

Commented by 676597498 last updated on 19/Nov/20

$$stopintimidatingpeople$$$$douknowifhe/sheisstillin$$$$secondaryschoollowerclass?$$$$stopspoilingurreputation$$$$ifudontwanttohelpsomeone,$$$$dontbetalkingsostupidly...sorrytosay$$

Commented by bemath last updated on 19/Nov/20

why are you angry? nothing intimidating here. so take it easy. no need to be angry like that.

Commented by MJS_new last updated on 19/Nov/20

$${\mathrm{that}}^{\prime }\mathrm{s}\mathrm{why}\mathrm{I}\mathrm{asked}‘‘\mathrm{what}\mathrm{is}\mathrm{it}\mathrm{you}{\mathrm{don}}^{\prime }\mathrm{t}$$$${\mathrm{understand}}^{″}.\mathrm{expecting}\mathrm{an}\mathrm{answer}\mathrm{so}\mathrm{I}\mathrm{can}$$$$\mathrm{help}\mathrm{as}\mathrm{needed}.$$

Commented by Ar Brandon last updated on 19/Nov/20

This is his first post and it's possible that he maybe testing the app or the forum.

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