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
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