2 answers:
3x - 4y = 10
3x = 10 + 4y
3x -10 = 4y
3x - 10 = y
---------
4
first you add y so it will be positive
Then you take away the 10 so you get the subject on its own
then divide by 4 to get 1 y
3x-4y=10
or,4y=3x-10
or,y=(3x-10)/4
so,y=3/4 x-5/2
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