2x+(26-x)x6=120
2x+156-6x=120
6x-2x=156-120
4x=36
x=36/4
x=9
(请采纳)
x+(26-x)*3=60
x+78-3x=60
2x=18
x=9
2x+(26-x)x6=120
2x+26*6-6x=120
4x=26*6-120
4x=26*6-120=36
x=9


2x+(26-x)x6=120
2x+156-6x=120
6x-2x=156-120
4x=36
x=36/4
x=9
(请采纳)
x+(26-x)*3=60
x+78-3x=60
2x=18
x=9
2x+(26-x)x6=120
2x+26*6-6x=120
4x=26*6-120
4x=26*6-120=36
x=9

