11X + 7 = 8X + 19
subtract 8X from each side
11X - 8X + 7 = 8X - 8X + 19
3X + 7 = 19
subtract 7 from each side
3X + 7 - 7 = 19 - 7
3X = 12
divide each sides integer by 3
(3/3)X = 12/3
X = 4
=======Check in original equation
11(4) + 7 = 8(4) + 19
44 + 7 = 32 + 19
51 = 51
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x = 8
11x + 8 = 8x + 20 3x + 8 = 20 3x = 12 x = 4
That's an equation where x = 5
3x+5y+8x+2y combine 3x and 8x to get 11x 11x+5y+2y combine 5y and 2y 11x+7y is the answer.
9x + 3x - 9x = 6 + 8x - 113x = 8x - 11-5x = -11x = 2.2 or 11/5