3x+4y=-25;2x-3y=6 solve by elimination method.Please answer my question as fast you can with explanation.
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Answer:
3x+4y=-25.....(1).
and 2x-3y=6......(2).
Multiply equation (1) with 3 & equation (2) with 4.
3(3x)+3(4y)=3(-25).
9x+12y=-75......(3).
4(2x)-4(3y)=4(6).
8x-12y=24......(4).
Add equation (3) & equation (4).
9x+12y=-75.
8x- 12y= 24.
17x = -51.
17x=-51.
x=-51/17.
x=-3.
By putting x value in equation (1).
3x+4y=-25.
3(-3)+4y=-25.
-9+4y=-25.
4y=-25+9.
4y=-16. (Because -×+=- & largest number is important).
y=-16/4.
y=-4.
So, x=-3 & y=-4.
I think this is your answer.
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