Question

解方程 急~~~~

Answer 1

1) (f + 7.5) * 25% = 18 f + 7.5 = 18/25% f + 7.5 = 72 f = 64.5 ===== 2) (h/2) - (2又1/4) = 8又1/3 (h/2) - (9/4) = 25/3 (2h/4) - (9/4) = 25/3 (2h - 9)/4 = 25/3 3(2h - 9) = 100 6h - 27 = 100 6h = 127 h = 127/6 h = 21又1/6 ===== 3) 54 + 8j = 68 8j = 14 j = 7/4 j = 1又3/4 ===== 4) 情况一： 5.5 + (k/7) = 26.5 k/7 = 21 k = 147 情况二： (5.5 + k) / 7 = 26.5 5.5 + k = 185.5 k = 180 ===== 5) 情况一： (m/9) -6 = 12 m/9 = 18 m = 162 情况二： (m - 6) / 9 = 12 m - 6 = 108 m = 114 ===== 6) 55% * (N - 6) = 27.5 N - 6 = 27.5 / 55% N - 6 = 50 N = 56 ===== 7) 情况一： p + (6/57) = 18 p = 18 - (6/57) p = 17又51/57 p = 1020/57 情况二： 6 / (p + 57) = 18 p + 57 = 6/18 p + 57 = 1/3 p = -56又2/3 p = -170/3 ===== 8) 3.8(q - 6.7) = 8.36 q - 6.7 = 8.36/3.8 q - 6.7 = 2.2 q = 8.9 ===== 9) (4/R) + (1又2/5) =3又5/8 (4/R) + (7/5) = 29/8 4/R = (29/8) - (7/5) 4/R = (145/40) - (56/40) 4/R = 89/40 89R = 160 R = 160/89 R = 1又71/89 ===== 10) (6/5s) -3 = 4又1/2 (6/5s) = (9/2) + 3 (6/5s) = 15/2 75s = 12 25s = 4 s = 4/25 ===== 11) t[(1又2/3)+ (3又7/9)] = 2又1/3 t[(5/3) + (34/9)] = 7/3 t[(15/9) + (34/9)] = 7/3 49t/9 = 7/3 7t/3 = 1 t = 3/7 ===== 12) 3U + 8.4 = 88.5 3U = 80.1 U = 26.7 ===== 13) (W + 1.6) ÷ 12% = 15 W + 1.6 = 15 * 12% W + 1.6 = 1.8 W = 0.2
参考: 土扁