Question

simultaneous equations is 4x + 3y = 18 , 3x - 2y = 5​

Answer 1

Let 4x+3y=18---------(1)

3x-2y=5----------(2)

multiple eqn(1) by 3,we get

12x+9y=54-----(3)

multiple eqn (2) by 4,we get

12x-8y=20-----(4)

subtract eqn(4) from(3)

12x+9y=54

- 12x-8y=20

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

y=34

place y=34 in eqn (2)

3x-2y=5

3x-2*34=5

3x-68=5

3x=5-68

3x=-63

x=-63/3

x=-21

(x,y). (34,-21)