How do you solve 3y-4j equals 9?

Answer 1

Express one variable in terms of the other.

3Y - 4J = 9

3Y = 4J + 9

Y = (4J + 9)/3

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insert back into original equation

3(4J + 9)/3 = 9

you see the 3 factors cancel

4J + 9 = 9

4J = 0

J = 0

-------------you have J

3Y - 4(0) = 9

3Y = 9

Y = 3

----------------one set of solutions to this problem