1.7+X1.7+X+【26-X-(7+X)】*3=34 2.5*6+4X+50*7+(55-6-X-7 )*20=1180
问题描述:
1.7+X1.7+X+【26-X-(7+X)】*3=34 2.5*6+4X+50*7+(55-6-X-7 )*20=1180
答
1.7+X1.7+X+【26-X-(7+X)】*3=34
1.7+2.7x+57-6x=34
3.3x=18.7
x=17/3
2.5*6+4X+50*7+(55-6-X-7 )*20=1180
15+4x+350+980-20x=1180
16x=165
x=165/16