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Misha Larkins [42]
3 years ago
15

X+7y=24 X-9y=-24 Work needed for substitution method!!

Mathematics
1 answer:
kumpel [21]3 years ago
4 0
You can use a simultaneous equation - x + 7y=24 minus x-9y= -24 you end up with 16y = 48
Divide 48 by 16 and you get 3 is equal to y. Now put three into an equation eg, x + 21 = 24 it is now obvious that x = 3 as well as y = 3

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