Saved Bookmarks
| 1. |
2x + y = 7 4x - 3y + 1 = 0 |
|
Answer» 2x + y = 7 .....equ (i)and4x-3y+1=0.......equ(ii)Elimination method: in this method we eliminate one of the variable (ie, x or y) and reduce the equation into one variable equation and thus find the solutionLet\'s begin !step: 1Multiply the equation 1 by two so as to make the the coefficient of x same in both equation=>2(2x+y=7)or, 4x+2y=14.........equ(iii)Step: 2Subtract the two equations ie, (equiii and equ ii.=> 4x +2y=14 ....equ iii4x-3y=-1 .... equ ii..............................................We get, 5y= 15or, y=3{tex}\\boxed{y=3}{/tex}step: 3substitute it in equ ii4x-3y=-1=> 4x -3 (3) = -1or, 4x - 9= -1or, 4x=-1+9or, 4x=8or,x=8/4or,x=2{tex}\\boxed{x=2}{/tex}\xa0 Or Evaluation method Use elimination method |
|