What is the value of x in the equation x – y = 30, when y = 15?

asked Apr 23, 2019 74.1k views

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7 votes

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

Yeqing Zhang answered Apr 25, 2019

6.2k points

3 votes

Plug in y.

x-15= 30

Add 15 to the other side.

x= 45

I hope this helps!
~kaikers

Kmore answered Apr 28, 2019

by Kmore

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