Question

x-y/2-20=0 in two variables

Answer 1

Answer:

Yeah ! here is your answer!!!!

Step-by-step explanation:

The solution to x-2y=0; 3x+4y=20 is, x = 4 and y = 2. The equation involves two variables and their degree is 1 and hence it's called Linear Equation in two variables. Explanation: We will be using the elimination method to solve for x and y.

Answer 2

Answer:

Since we are given y in terms of x, we can substitute directly into the other equation.

⇒

x

2

+

(

x

−

4

)

2

=

20

←

equation in one variable

⇒

x

2

+

x

2

−

8

x

+

16

−

20

=

0

←

quadratic equation

⇒

2

x

2

−

8

x

−

4

=

0

divide both sides by 2

x

2

−

4

x

−

2

=

0

To solve use the

quadratic formula

with

a

=

1

,

b

=

−

4

,

c

=

−

2

⇒

x

=

4

±

√

24

2

=

4

±

2

√

6

2

=

2

±

√

6

Step-by-step explanation:

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