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8x-8w = 0
9 8w - 17 = -89 ie 8w = -89 + 17 = -72 w = -9
15.0526
If X+Y = 42, and 2X + Y = 57, then if you subtract the first equation from the second, 2X + 1Y = 57 1X + 1Y = 42 - ---------------- 1X + 0Y = 15 That means that Y = 27. 15 + 27 = 42 15 + 15 + 27 = 57.
1138 15 29 57 ___From 8: add 7 = 1515 + (7 * 2) = 15 + 14 = 2929 + (14 * 2) = 29 + 28 = 5757 + (28 * 2) = 57 + 56 = 113