Решить систему методом подстановки. Created by OlegPozitiv. matematika-ru

Решить систему методом подстановки...

March 2022 2 21 Report

Решить систему методом подстановки

Indentuum

$\left \{ {{x + 5y = 35} \atop {3x + 2y = 27}} \right. \rightarrow
\left \{ {{x = 35 - 5y} \atop {3x + 2y = 27}} \right. \rightarrow
\left \{ {{x = 35 - 5y} \atop {3(35 - 5y) + 2y = 27}} \right. \rightarrow
\left \{ {{x = 35 - 5y} \atop {y = \frac{78}{13} = 6}} \right.
\rightarrow \left \{ {{x = 5} \atop {y = 6}} \right$

2 votes Thanks 1

NikkiAS

X=35-5y 3×35-3×5y+2y=27 105-15y+2y=27 105-27-13y=0 13y=78 Y=6

1 votes Thanks 1

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