`12(3x - 117) = 0`
`=> 3x - 117 = 0 : 12`
`=> 3x - 117 = 0`
`=> 3x = 0 + 117`
`=> 3x = 117`
`=> x= 117/3`
`=> x = 39`
__
`942 - ( x + 147 ) = 229`
`=> x + 147 = 942 - 229`
`=> x + 147 = 713`
`=> x = 713 - 147`
`=> x = 566`
12.(3x-117)=0
3x-117=0
3x=117
X=117/3
942-(x+147)=229
942-x-147=229
-x=-634
X=634
Chu
12.(3x-117)=0
3x-117 =0:12
3x-117 =0
3x =0+117
3x =117
x =117:3
x =39
942-(x+147)=229
x+147 =942-229
x+147 =713
x =713-147
x =566