little68941
08.09.2020 •
Mathematics
3x-2y=1
-x+y=9
Solve by elimination
Solved
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Ответ:
x=19 and y=28
Step-by-step explanation:
3x-2y=1
-x+y=9 which is x=y-9
Substitute the value of x=y-9 in the equation 3x-2y=1
3(y-9)-2y=1
3y-27-2y=1
y-27=1
y=27+1=28
Substitute the value of y=28 in the equation -x+y=9
-x+28=9
x=28-9=19
Ответ:
88.66
Step-by-step explanation:
14.3 * 6.2
88.66