Math, asked by Aatmajasaheb8, 3 days ago

Q8. Solve the simultaneous equation x + y = 4 and x - y = 8. find the value of x and y. *
1 point
a. x = 6 ; y = -2
b. x = -2 ; y = 7
c. x = 3 ; y = 4
d. x = 4 ; y = 6

answer quickly please

Answers

Answered by ayaan321

Answer:

In which of the following pairs, sets A and B are not equivalent?

A={0} and B={x: x is a whole no and x < 1}

A={x: x=2^n , n belong to W and n < 5} and B={a, e, i, o, u}

A={letters of the word "TIGER"} and B={letters of the word "SCHOOL"}

A={letters of the word "QUARANTINE"} and B={letters of the word "ISOLATION"}

Answered by devanshu1234321

Solve the simultaneous equation x + y = 4 and x - y = 8. find the value of x and y.

a. x = 6 ; y = -2

b. x = -2 ; y = 7

c. x = 3 ; y = 4

d. x = 4 ; y = 6

Let -:

→x+y=4 {EQUATION-1}

→x-y=8 {EQUATION-2}

Now,

From EQUATION-1 we have-:

→x+y=4

→x=4-y {EQUATION-3}

Substitute x=4-y in EQUATION-2

→x-y=8

→4-y-y=8

→4-2y=8

→-2y=8-4

→-2y=4

→y=-4/2

→y=-2

So the value of y is -2.

Now put y=-2 in EQUATION-1

→x+y=4

→x+(-2)=4

→x-2=4

→x=6

Therefore-:

x=6 and y=-2

Hence option[a] is required answer