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daser333 [38]
4 years ago
12

Two times a number plus three times another number number equals 13.

Mathematics
1 answer:
earnstyle [38]4 years ago
5 0
x-\ first\ number\\y-\ second \ number\\\\
2x+3y=13\\
x+y=7\ \ -->\ \ x=7-y\\\\
2(7-y)+3y=13\\
14-2y+3y=13\\
14+y=13\\
y=-1\\
x=7+1=8\\\\
Numbers\ are\ -1\ and\ 8.
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Step  3  :

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<h3>Scientific notations</h3>

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