Its my homework-method of supstitution! example :
3x-2y=6. =>x=13-3y
x+3y=13. x=13-3•3...
Mathematics, 21.04.2020 22:03 Vivi4558
Its my homework-method of supstitution! example :
3x-2y=6. =>x=13-3y
x+3y=13. x=13-3•3
3•(13-3y)-2y=6 x=13-9 = x=4
39-9y-2y=6. result (4,3)
-9y-2y=6-39
-11y=-33/:(-11)
y=3
the results of what needs to come for my homework
a) (5,3)
b) (10,-4)
c) (-1,1)
d) (-1,1)
2,2
Answers: 3
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