Question

20.If the point (3,-1) lies on the graph of the equation ax + 7y = 2, then what is
the value of a?
A)6
B)3 C)-3
DI​

Answer 1

GIVEN :

If the point (3,-1) lies on the graph of the equation ax + 7y = 2, then what is the value of a.

TO FIND :

The value of 'a' in the given equation.

SOLUTION :

Given that the point (3,-1) lies on the graph of the equation ax + 7y = 2

Given equation is ax + 7y = 2

Since the point (3,-1) lies on the graph of the given equation ax + 7y = 2,

⇒ substitute the values for x=3 and y=-1 in the given equation we get,

a(3)+7(-1)=2

3a-7=2

3a=2+7

3a=9

$a=\frac{9}{3}$

∴ a=3

⇒ option B) 3 is correct.

∴ the value of a in the given equation ax+7y=2 is 3.

Answer 2

Answer:

जर (3-1 ) हा बिंदू ax+7y=2 या समीकरणाच्या आलेखवर असेल तर a=?