CBSE Class 10  Substitution Method Videos
Substitution Method
This video explains the concept of substitution method to solve a pair of linear equations and apply the same to solve word problems.
 The value of 'x' and 'y' when x+y=6 and xy=10 a) (8,2) b) (2,8) c) (8,2) d) (2,8)
 10 students of class 10 took part in a mathematics quiz . if the number of girls is 4 more than the number of boys then ,find find the numbers of boys and number of girls who took part in the quiz

Ncert solution ex.3.3 Q.no.1.6
 substitution method
 A number consists of two digits whose sum is 7. If 45is added to the number, the digits are reversed.Find the number
 A boys works x+y sums, of which only y 2z are right; how many are wrong?
 Students of a class are made to stand in a row. If one student is extra in each row, there would be 2 rows less. If one student is less in each row, there would be 3 rows more. Find the number of students in each class.
 QUse the method of substitution to solve each other of the pair of simultaneous equation 1} x+4y=4 and 3y5x=1
 QUse the method of substitution to solve each other of the pair of simultaneous equation 1} 2x9y=9 and 5x+2t=27

Please solve.