Mathematics: X+2y=14 Y=3x-14 Substitution

X+2y=14 Y=3x-14 Substitution - id2143147504801, AllanCasey12

Ответ:

mandy9386

02.02.2022

$\left \{ {{x+2y=14} \atop {y=3x-14}} \right.\\\\Substitution\\\\
x+2(3x-14)=14\\
x+6x-28=14\\
7x-28=14\ \ \ | add\ 28\\
7x=42\ \ \ | divide\ by\ 7\\x=6\\
y=3x-14=3*6-14=18-14=4\\\\Solution:\\ \left \{ {{y=4} \atop {x=6}} \right.$

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Ответ:

shahfaisal

11.09.2020

Mathematics

Only one.

Everyone else will be a congruent to the first one triangle.

SAS stands for "side, angle, side" and means that we have two congruent triangles where we know two sides and the included angle are equal.

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X+2y=14
Y=3x-14
Substitution

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