Question 402823
Do it like this one.
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3j+5k=19
j-2k=-1 
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Multiply the 2nd eqn by 3 to make the coefficients equal
3j+5k=19
3j-6k=-3
---------- Subtract
-k = 22
k = 22
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j - 2k = -1
j -44 = -1
j = 43