Question

Prac
(1) Complete the following activity
5x + 3y = 9.-----(I)
2x - 3y = 12
(II)
Let's add eqations (I) and (II).
5x + 3y = 9
+
2x
3y = 12
X =
X =
X =
:. Solution is (​

Answer 1

$\huge\dag\mathbf\red{AnSWer}\dag$

Here,

5x + 3y = 9 ------- Eq.(i)

2x - 3y = 12 ------ Eq.(ii)

By adding Eq.(i) and Eq.(ii), we get

5x + 3y = 9

2x - 3y = 12

_________

7x = 21

x = $\frac{21}{7}$

$\large\fbox{ x = 3}$

$\mapsto$ By substituting the value of x in Eq.(ii), we get

====> 2x - 3y = 12

====> 2(3) - 3y = 12

====> 6 - 3y = 12

====> -3y = 12 - 6

====> -3y = 6

$\large y= \frac {6}{-3}$

$\large y = (-2)$

$\large\fbox{So, the value of x is 3 and of y is (-2)}$