Question

Then find y value of the following sum 3x=7y-21

Answer 1

Answer:

3x=7y−21

(i)3x=7y−21

If x=0 we get

3×0=7y−21

⇒7y−21=0

⇒7y=21

⇒y=3

(0,3)

(ii)3x=7y−21

If y=0 we get

3x=7×0−21

⇒3x=21

⇒3x=21

⇒x=3

(3,0)

(iii)3x=7y−21

If x=1 we get

3×1=7y−21

⇒3=7y−21

⇒7y=21+3

⇒7y=24

⇒y=

7

24

(1,

7

24

)

Answer 2

Step-by-step explanation:

Step-by-step explanation:

To find : Draw the graph of the linear equation 3x-7y=213x−7y=21 ?

Solution :

We plot the linear equation by two intercept points.

The x-intercept is when y=0,

Put y=0 in the equation,

3x-7(0)=213x−7(0)=21

3x=213x=21

x=\frac{21}{3}x=321

x=7x=7

The point is (7,0).

The y-intercept is when x=0,

Put x=0 in the equation,

3(0)-7y=213(0)−7y=21

-7y=21−7y=21

y=-\frac{21}{7}y=−721

y=-3y=−3

The point is (0,-3).

We plot the points and draw a straight line.

Refer the attached graph below.

#Learn more

Draw graph of this equation :-

→ y = |2x - 3| .