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x x x x x x 3x – 5 = 7 = x x x x x x = X = +4
x x x x 2x + 3 = 9 +1 = x x x x = X = +3 x x x x =
2M – 4 = M = M = - 5
-4M + 8 = M = M = 12.5
X = X = (-3) - 3 X -2 = 46
X = X = X 6 = 8 1 1
X + 7 = X + 7 = X = 23
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3x – 5 = 7 = x x x +1 = X =
x x 2x + 3 = 9 +1 = x x +1 = X = +1 x x =
2M – 4 = - 14 = =
-4M + 8 = - 42 = =
X = = - (-3) =
X = = - 11 = 1
X + 7 = 3 10 = =