\( 6 x+(9 x-3)=147 \)
\( x = 10 \)
Step 1 :\( 6x + 9x - 3 = 147 \)
Step 2 :\( 15x - 3 = 147 \)
Step 3 :\( 15x = 150 \)
Step 4 :\( x = 10 \)