A) x + (z + n) + (w + p) + (k + l) si x + z = 12, n + k = 8, w + l = 20 y p = 5b) (a + m) + n - t + ( b - j ) si a + m = 20, n - t = 15, b - j = 1c) t + s + (a + b) + w + x si w + s = 12, a + b = 20 y?
A) x + (z + n) + (w + p) + (k + l) si x + z = 12, n + k = 8, w + l = 20 y p = 5 b) (a + m) + n - t + ( b - j ) si a + m = 20, n - t = 15, b - j = 1 c) t + s + (a + b) + w + x si w + s = 12, a + b = 20 y t + x = 35.