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- agomez
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1) 2x + 3x = 20 5x = 20 x = 20/5 x = 4 2) 3x + 5 = 2x + 6 3x - 2x = 6 - 5 x = 1 3) 8x + 6 + x = x + 5 + 1 9x + 6 = x + 6 9x - x = 6 - 6 7x = 0 x = 0/7 x = 0 4) - 2x - 12 + 1 = - 3x + 4 - 2x - 11 = - 3x + 4 - 2x + 3x = 4 + 11 x = 15 5) x - 2 + 7 = 8x - 15 x + 5 = 8x - 15 x - 8x = - 15 - 5 - 7x = - 20 x = - 20/-7 x = 20/7 6) 20 + x - 1 = - 9x + 5 x + 19 = - 9x + 5 x + 9x = 5 - 19 10x = - 14 x = - 14/10 x = - 7/5 7) 3x + 6 - 2x = - 5x + 6 - 3 x + 6 = - 5x + 3 x + 5x = 3 - 6 6x = - 3 x = - 3/6 x = - 1/2 8) 12x - 144 = 0 12x = 144 x = 144/12 x = 12 9) 13x + 0 = 169 13x = 169 x = 169/13 x = 13 10) 11x + 11 = x + 50 11x - x = 50 - 11 10x = 39 x = 39/10
Gracias
