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Step-by-step explanation:
13. - 6/ 8 = - 3/4
15. (2/3* 3/-7 ) * - 21
= 2/-7 * 21
= 2/ - 1 * 3
= -6
angel369:
answer for which question
13. and 15. I have mentioned also
ok
explain 13
Divide both the numerator and denominator with 2
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