Question

If 7x+15=50 then which of the following is the root of the equation?

Answer 1

Step-by-step explanation:

GIVEN :

The equation is 7x+15 = 50

TO FIND :

The root of the given equation.

SOLUTION :

Given that the equation is 7x+15=50

To find the root of the equation.

That is the root must satisfy the given equation.

i) Put x=-5 in given equation we get,

7(-5)+15=50

-35+15=50

-20\neq 50−20≠50

∴ -5 is not a root.

ii) Put x=\frac{65}{7}x=

7

65

in given equation we get,

7(\frac{65}{7})+15=507(

7

65

)+15=50

65+15=50

80\neq 5080≠50

∴ \frac{65}{7}

7

65

is not a root

iii) Put x=5 in given equation we get,

7(5)+15=50

35+15=50

50= 50

∴ 5 is a root.

Option iii) 5 is correct.

∴ 5 is the root of the given equation 7x+15=50.

Answer 2

Step-by-step explanation:

answer is 5

Hope you understand the answer