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Kane
Mathematics
24 September, 03:11
Solve, using the substitution method.
j + k = 3
j - k = 7
+5
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Shania King
24 September, 03:16
0
To use the substitution method, you first need to set j or k = to something else like this. j+k=3 subtract k from both sides to get j=3-k
Now use the second equation and substitute 3-k where j is like this. 3-k-k=7
3-2k=7 subtract 3 from both sides to get - 2k=4
divide both sides by - 2 to get k=-2
now use - 2 for k and solve for j in either equation and you will get. j=5
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Alexzander Frederick
24 September, 03:31
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J = 5 and k = - 2 that is your answer
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