Question

2x+7y-5=0;-3x+8y=-11,solve the following by elimination method.

Answer 1

Step-by-step explanation:

3( 2x + 7y - 5 ) = 0

6x + 21 y - 15 = 0 ......1st equation

now,

2(3x + 8y )= - 11 x 2

6x + 8y + 22 = 0 .....2ND

so,

subtraction of 1st and 2nd equation,

6x + 21y -15 = 0

6x + 8y + 22 = 0

______________

29y + 7 = 0

now,

y = - 7 / 29

and

substitute y in 1st equation,

x is will found