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CBSE Class 7 Answered

The Sum of 3 is  integers is 15. If two of the integers are (-11)andb 7 , find the third integers.
 
 
Asked by jainsahil860 | 11 Jul, 2015, 09:20: AM
answered-by-expert Expert Answer
G i v e n space t h a t space t h e space s u m space o f space t h r e e space i n t e g e r s space i s space 15. A l s o space g i v e n space t h a t space t w o space o f space t h e space i n t e g e r s space a r e space minus 11 space a n d space 7. W e space n e e d space t o space f i n d space t h e space t h i r d space i n t e g e r. L e t space apostrophe x apostrophe space b e space t h e space t h i r d space i n t e g e r. F r o m space t h e space g i v e n space s t a t e m e n t comma space w e space h a v e comma open parentheses negative 11 close parentheses plus 7 plus x equals 15 A d d i n g space 11 space o n space b o t h space t h e space s i d e s comma space w e space h a v e comma 11 plus open parentheses negative 11 close parentheses plus 7 plus x equals 15 plus 11 rightwards double arrow 0 plus 7 plus x equals 26 rightwards double arrow 7 plus x equals 26 N o w space s u b t r a c t space 7 space f r o m space b o t h space t h e space s i d e s comma space w e space h a v e comma 7 plus x minus 7 equals 26 minus 7 rightwards double arrow 0 plus x equals 19 rightwards double arrow x equals 19 T h u s comma space t h e space t h i r d space i n t e g e r space i s space 19.
Answered by Vimala Ramamurthy | 11 Jul, 2015, 10:40: AM

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