DAJE NAJJ POMOCY zadanie w załącznikach

1. (x - 2)/(x + 4) - 5/6 = 0  założenie x + 4 ≠ 0 ⇒ x ≠ - 4 (x - 2)/(x + 4) - 5/6 = 0 / * 6(x + 4) 6(x + 2) - 5(x + 4) = 0 6x + 12 - 5x - 20 = 0 x = 20 - 12 = 8 2. 2/(x + 3) + 1/x = 0   założenie x ≠ 0 i x + 3 ≠ 0 ⇒ x ≠ 0 i x ≠ - 3 2/(x + 3) + 1/x = 0 / * x(x + 3) 2x + x + 3 = 0 3x = - 3 x = - 1 f) 3(x - 11)/4 = 3(x + 1)/5 - 2(2x - 5)/11 / * 220 55 * 3(x - 11) = 44 * 3(x + 1) - 20 * 2(2x - 5) 165(x - 11) = 132(x + 1) - 40(2x - 5) 165x - 1815 = 132x + 132 - 80x + 200 165x - 1815 = 52x + 332 165x - 52x = 332 + 1815 113x = 2147 x = 2147 : 113 = 19 g) [x + (4 - x)/3]/5 = [x - (x - 5)/5]/3 [(3x + 4 - x)/3]/5 = [(5x - x + 5)/5]/3 [(2x + 4)/3]/5 = [(4x + 5)/5]/3 5(4x + 5)/5 = 3(2x + 4)/3 4x + 5 = 2x + 4 4x - 2x = 4 - 5 2x = - 1 x = - 1/2