Question

1) Solve : 3x + 4y = 18, 7x - 2y = 22​

Answer 1

Answer:

X= 62/17 ;. Y= 120/68

Step-by-step explanation:

let us do this equation by elimination method....

given..

3x +4y=18............(1)

7x -2y= 22.............(2)

now, to cancel y we have to make the both the terms same....so multiply by 2 on

eq(2)

3x + 4y =18

2(7x - 2y = 22)

........

3x + 4y = 18

14x - 4y = 44

now eliminate .. .

3x + 4y = 18

14x - 4y = 44

17x + 0. = 62

17x=62

X=62/17,,.............(3)

sub X value (3) in(1)....

3x + 4y =18

3(62/17) + 4y = 18

186/17 + 4y =18

4y = 18/1 - 186/17

to make denominator same multiply 18/1 by 17

4y = 18×17/1×17- 186/17

4y= 306-186/17

4y= 120/17

y= 120/17×4

y= 120/68,,

HOPE THIS WILL HELP U

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