10th Algebra Chapter 1 | Practice Set-1.3 | Equations in Two Variables | Lecture 7 |

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3 : x = 3. y = -2
4 : x = 2. y = 6
4 : x = 5/8. y = 1/4
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Question no.3 X=3 & Y =-2
Question no.4 X =2 & Y =6
Question no.6 X=5/8 & Y=1/4

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Homework ✅
👇👇👇
Q.3 - (x, y) = (3, -2)
Q.4 - (x, y) = (2, 6)
&
Q.6 - (x, y) = (⅝, ¼)

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*(9) Endothermic Reaction
Ans.
(i) A reaction in which heat is either absorbed from the
surrounding or has to be supplied continuously
from outside is called as endothermic reaction.
(ii) e.g. melting of ice, dissolution of potassium
nitrate in water. During the process of dissolution
of potassium nitrate (KNO3
) in water, heat from
the surroundings is absorbed and therefore, the
temperature of the resulting solution is less.
(iii) The process in which heat is absorbed from
outside is called endothermic process.
(iv) KNO3(s) + H2
O(l) + Heat → KNO3(aq)
Potassium
nitrate
Water Potassium nitrate
solution