lesliemar
22.03.2021 •
Mathematics
The first step in solving the given system of equations
3x + 2y = 8
-x + y = -11
by substitution is
Solved
Show answers
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Ответ:
Step-by-step explanation:
3x + 2y = 8 (1)
-x + y = -11 (2)
(2) multiply by 3;
3 * (-x + y) = 3 * (-11 )
-3x + 3y = -33 (3)
(1) + (3)
(3x + 2y) + ( -3x + 3y) = 8 + (-33)
3x -3x + 2y + 3y = -25
5y = -25
y= -5
value of y substitution in to (2);
-x + y = -11
-x + (-5) = -11
-x = -6
x=6
Ответ:
X=8-2y/3
-(8-2y/3)+y=-11
-8+2y/3+y=-11
Y=-11+8-2y/3
Y=-11x3/1x3+8-2y/3
Y=(-33+8-2y)/3
Y=(-25-2y)/3
2y=8-3x
Y=8-3x/2
-x+8-3x/2=-11
-x=-11-8+3x/2
-x=-19+3x/2
X=-(-19+3x/2)
Ответ:
Step-by-step explanation:
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