5 - 2x = 10, x is, 4 - 4x - 10 = 6, x is, 8 - 2x + 2 - 6 = 12, x is, 2 - -7x = -14, x is, -3 - -2x = 6, 10x - 15 - 5(2x - 3), expand, 10x + 15 - 5(2x + 3), expand, a - 2a - ab - a + ab, simplify, 7x - 14 - -7(2 - x), expand, 2y - 3y + 2 - y - 2, simplify, -1/2 - 10x = -5, x is, 1 - 3 + 2a = 5a, a is, x - 3 - 1(x - 3), expand, -x - 4 - 2x - 4 - 3x, simplify, -1/2 - -8x = 4,

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