標題:
簡易方程式(20點)
發問:
六分之一(2y十6)=八分之一(10-2y) y= 8z-3 ____ =20%X(3z+2) 6 z=
最佳解答:
六分之一(2y十6)=八分之一(10-2y) y = ? 1/6 (2y + 6) = 1/8 (10 – 2y) (1/6) (2y) + (1/6) (6) = (1/8) (10) – (1/8)(2y) (1/3)y + 1 = 10/8 - (2/8)y (1/3)y + 1 = 5/4 - (1/4)y (1/3)y + (1/4)y = 5/4 - 1 (4/12)y + (3/12)y = 1/4 (7/12) y = ? y = (?)/(7/12) y = (?)/(12/7) y = 3/7 ------------------------------------------------------- 8z-3 ____ =20%X(3z+2) 6 z = ? 8z-3 ____ =20/100 X(3z+2) 6 8z-3 ____ =0.2 X(3z+2) 6 8z – 3 = 0.2 X 6 (3z + 2) 8z – 3 = 1.2 (3z + 2) 8z – 3 = (1.2) (3z) + 2(1.2) 8z – 3 = 3.6z + 2.4 8z – 3.6z = + 2.4 + 3 4.4 z = 5.4 z = 54/44 z = 27/22
此文章來自奇摩知識+如有不便請留言告知
其他解答:
文章標籤
全站熱搜
留言列表
