X-y= 3
b) Work out the value of 2x - 2y
c) Work out the value of y-x
1 answer:
Answer:
x - y = 3
x = 3 + y
y = x - 3
b) 2x - 2y
= 2(3+y) - 2( x - 3)
= 6 + 2y - 2x + 6
= - 2x + 2y + 12
Divide all terms by 2
we have
- x + y + 6
c) y - x
= x - 3 - ( 3 + y)
= x - 3 - 3 - y
= x - y - 6
I hope this helps you.
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