1. -
P - (P + 4) = 4 (P - 1) + 2P P - P - 4 = 4 P - 4 + 2P - 4 = 6P - 4 - 4 + 4 = 6P 0 = 6P 0 / 6 = P P = 0
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2.
- - 3 (y - 1) + 2y = 4 (y - 3) - 3y + 3 + 2y = 4y - 12 - y + 3 = 4y - 12 - y - 4y = - 12 - 3 - 5y = - 15 y = 15 / 5 y = 3
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3.
- ? _____________________________________________________________
4.
-
4 (2× - 2) - 3 (× + 7) = - 4 8x - 8 - 3x - 21 = - 4 5x - 29 = - 4 5x = - 4 + 29 5x = 25 x = 25 / 5 x = 5
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5.
- - 4 (3 - 4×) - 2 (× - 1) = 12× - 12 + 16x - 2x + 2 = 12x 16x - 2x - 12x = - 2 + 12 2x = 10 x = 10 / 2 X = 5.