Question

3x + 4y = 15. and 7x - 2y = 1 how to solve it by elimination​

Answer 1

Answer:

let equation 1. 7x-2y=1

and equation 2. 3x+4y=15

now , in equation 1.

7x-2y=1

x=1+2y/7

from eq. 1putting the value of x in equation 2. we get;

3x+4y=15

y=3

so x=1

Step-by-step explanation:

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Answer 2

Answer:

Here is your answer mate

Step-by-step explanation:

3x+4y=15 ----- eqn 1.

7x-2y= 1 ------ eqn 2.

Multiplying 2nd eqn by 2

14x-4y =2 ----- eqn 3

Adding eqn 1 and 3

3x +4y = 15

14x -4y = 2

------------------

17x = 17

x = 1

Substituting x= 1 in eqn 1

3(1) +4y = 15

3+4y =15

4y= 15-3

4y = 12

y = 3

Soln : (x,y) - (1,3)

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