`2x - 138 = 2^3 . 3^2`
`2x - 138 = 8 . 9`
`2x - 138 = 72`
`2x= 72 +138`
`2x=210`
`x=210:2`
`x= 105`
vậy `x=105`
2x - 138 = 23. 32
2x - 138 = 8 . 9 = 72
2x = 72 + 138 = 210
2x = 210 : 2 = 105
2x−138=23.322x-138=23.32
2x−138=8.92x-138=8.9
2x−138=722x-138=72
2x=72 +1382x=72 +138
2x=2102x=210
x=210:2x=210:2
x=105x=105
vậy x=105