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Title: How to solve this linear equation by elimination? Post by: smilemslisa on Aug 20, 2012 10x-9y=18
6y+2x=1 Title: How to solve this linear equation by elimination? Post by: asiananime8 on Aug 20, 2012 10x -9y = 18
5(2x+6y) = 5(1) 10x-9y=18 10x+30y=5 (10x-9y)-(10x+30y) = 18-5 -9y-30y = 13 - 39 y = 13 y = -3 Sub y = -3 into 6y +2x = 1 6(-3) + 2x = 1 -18 +2x = 1 -18-1 = -2x x = 19/2 x = 9.5 I hope i didnt make a mistake.. Title: How to solve this linear equation by elimination? Post by: rizkallah15 on Aug 20, 2012 Content hidden
Title: How to solve this linear equation by elimination? Post by: riyadamin on Aug 20, 2012 First write them so x's are first in each
10x -9y = 18 2x +6y = 1 multiply 2nd by 5 to make number of x's same 10x-9y=18 10x+30y = 5 subtract -39y = 13 y = 13/-39 = -1/3 put value in 2nd 2x + 6(-1/3)=1 2x -2 =1 2x = 3, x=3/2 check using values in 1st equation correct Title: How to solve this linear equation by elimination? Post by: asia on Aug 20, 2012 10x-9y=18
-5(6y+2x)=1 so: 10x-9y=18 -10x-30y=-5 by addition of two equation: -39y=13 so: y = - 1/3 thus substitute value of y: 10x-9(-1/3)=18 thus: x = 3/2 |