What is the value of x in the equation x – y = 30, when y = 15?
2 answers:
<span>x+y=30.....(1) and x-y=2......(2) so(1)+(2)......x+y+x-y=30+2 so 2x=32...x=16 now apply x=16 in (1) so we get......16+y=30 so .......y=14</span>
Plug in y.
x-15= 30
Add 15 to the other side.
x= 45
I hope this helps!
~kaikers
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