Morganwing1019
05.07.2021 •
Mathematics
Use the elimination method to solve the system of equations
2x+3y=8
x-y=9
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Ответ:
Step-by-step explanation:
x = 7 and y = -2
Step-by-step explanation:
2x +3y = 8 (1)
x-y = 9 (2)
multiply (2) by 2
2x-2y = 18(3)
subtract (2) from (3)
-5y = 10
Divide bothside by -5
y = -2
Similarly, multiply (2) by 3
3x-3y = 27(4)
add (1) and (4) together
5x = 35
Divide bothside by 5
x= 7
Therefore, x =7 and y= -2
Ответ:
14.204
14.210
14.240