If a:b =5:3, find : 5a-3b ÷ 5a+3b
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a=5x
b=3x
5a=5×5x=25x
3b=3×3x=9x
25x-9x/25x+9x
=16x/34x
=16/34
=8/17
b=3x
5a=5×5x=25x
3b=3×3x=9x
25x-9x/25x+9x
=16x/34x
=16/34
=8/17
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