这几道方程我不会解,求过程(要用一元一次方程方程来解!!!)非常急!!!

2024-12-22 18:38:28
推荐回答(2个)
回答1:

(1)解:0.4x-0.08+1.5=0.7x-0.38
0.4x-0.7x=-0.38+0.08-1.5
-0.3x= -1.8
x=6
(2)解:70-35x-90+75x=63-22x-84+63
-35x+75x+22x=63-84+63-70+90
62x=-64
x=-32/31

回答2:

(1)0.4(x—0.2)+1.5=0.7X—0.38
0 .4x—0.08+1.5=0.7X—0.38
0. 4x-0.7X=0.08-1.5-0.38
-0.3X = -1.8
X = 6
(2)35(2—x)—15(6—5x)=(63—22x)—21(4—3)
70-35X - 90 +75x = 63-22x - 21
-35x +75x +22x = 63-21-70+90
62x = 62
x = 1