3x+5y=-7 5x+4y=10 solve and graph

0  Views: 624 Answers: 1 Posted: 10 years ago

3x+5y=-7 5x+4y=10
3x + 5y = -35x + 4y = 10
3x + 5y - 4y = -35x + 4y - 4y = 10 - 4y
3x + y = -35x = 10 -4y
3x + 35x = 35x + 35x = 10 -4x + 35y
3X = 10 = -4x + 35y

3x/3 = 10/3 = -4x + 35y
3
x = 3 1/3 = 1  1/3x + 11 2/3 y
3 1/3 =   1 1/3( 3 1/3 ) + 11 2/3 y
3 1/3 = 4/3 x 10/3 + 11 2/3 y
3 1/3 = 40/9 + 11 2/3 y
3 1/3 = 3 4/9 + 11 2/3 y
3 1/3 - 3 4/9 = 3 4/9 - 3  4/9 + 11 2/3 y
30/9 - 40/9 = 11 2//3 y
-4/9 = 11 2/3y
-4/9 divided by 11 2/3 = 11 2/3y
11 2//3
4/9 x  3/35 = y
12/315= y
4/104 = y

OK, I doubt that's right; let's hope someone who knows better hits this question.   GRAPH? lol

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