Q: What is the answer to -x plus 7y -13 5x and ndash 7y -19?

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If you mean: 2y+5x = 13 and 2y-3x = 5 then x = 1 and y = 4

8(1+5x) +5 = 13+5x => 8+40x + 5 = 13 +5x => 13+40x = 13+5x => 13-13+40x = 13-13+5x => 40x = 5x => 40x - 5x = 0 => 35x = 0 => 35x/35 = 0/35 => x = 0

5x+1=20 5x=20-1 5x=19 5x/5=19/5 x=19/5

5x+49 = 8x+13 49-13 = 8x-5x 36 = 3x x = 12

3x+7=5x-13 ----> 3x-5x=-13-7 ----> -2x=-6 -----> x=3

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If you mean: 2y+5x = 13 and 2y-3x = 5 then x = 1 and y = 4

8(1+5x) +5 = 13+5x => 8+40x + 5 = 13 +5x => 13+40x = 13+5x => 13-13+40x = 13-13+5x => 40x = 5x => 40x - 5x = 0 => 35x = 0 => 35x/35 = 0/35 => x = 0

5x+1=20 5x=20-1 5x=19 5x/5=19/5 x=19/5

5x+49 = 8x+13 49-13 = 8x-5x 36 = 3x x = 12

5x - 4x = 13 - 3 ie x = 10

-5x + 13 = -12 -5x = -12 - 13 = -25 x = -25/-5 = 5

3x+7=5x-13 ----> 3x-5x=-13-7 ----> -2x=-6 -----> x=3

88=13+5x -13 -13 75= 5x 75/5 =15 x=15

3x - 7 = 5x + 133x - 5x = 13 + 7-2x = 20x = -10x=-3

8x - 19 = 3x + 1 5x -19 = 1 5x = 20 x = 4

3x - 7 = 5x + 13-2x = 20x = -10

If: 3x-7 = 5x+13 Then: x = -10