Q5 of 92 Page 73

Let us solve the following simultaneous equations in two variables by the method of substitution.


Given … (1)


And … (2)


Expressing x of equation (1) in terms of y,







… (3)


Substituting (3) in (2),






⇒ 630 – 62y = 72


⇒ 630 – 72 = 62y


⇒ 558 = 62y


∴ y = 9


Substituting y value in (3),






∴ x = 7


∴ By solving, we get x = 7 and y = 9.


More from this chapter

All 92 →
5

Let us solve the following simultaneous equations in two variables by the method of substitution.


 5

Let us solve the following simultaneous equations in two variables by the method of substitution.


 5

Let us solve the following simultaneous equations in two variables by the method of substitution.

p(x + y) = q(x – y) = 2pq

 1

Let us solve the following simultaneous linear equations in two variables by applying cross multiplication method.

8x + 5y = 1


3x – 4y = 10