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Question
Find (a + b) ÷ (a – b) if a = `(-3)/5`, b = `2/15`
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Solution
a = `(-3)/5`, b = `2/15`
a + b = `(-3)/5 + 2/15`
= `(-3 xx 3 + 2)/15`
= `(-9 + 2)/15`
= `(-7)/15`
a − b = `(-3)/5 - 2/15`
= `(-3 xx 3 - 2)/15`
= `(-9 - 2)/15`
= `(-11)/15`
(a + b) ÷ (a – b) = `(-7)/15 ÷ (-11)/15`
= `(-7)/15 xx 15/(-11)`
= `7/11`
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