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Sagot :
the easiest way to solve that would be elimination method, but if you have to do substitution:
x-9=-3
add 9 to each side to get
x=6
then plug 6 into the other equation for x
2(6)-y=23
and solve for y :)
x-9=-3
add 9 to each side to get
x=6
then plug 6 into the other equation for x
2(6)-y=23
and solve for y :)
2x - y = 23
x - 9 = -3
x - 9 = -3
+ 9 + 9
x = 6
2(6) - y = 23
12 - y = 23
- 12 - 12
-y = 11
y = -11
(x, y) = (6, -11)
x - 9 = -3
x - 9 = -3
+ 9 + 9
x = 6
2(6) - y = 23
12 - y = 23
- 12 - 12
-y = 11
y = -11
(x, y) = (6, -11)
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