Question

2{7x-3[3(x+1)-2(x+4)]-9}=5(x+3)

Answer 1

2{7x-3[3(x+1)-2(x+4)]-9}=5(x+3)

2[7x-3(3x+3-2x+8)-9]=5x+15

2(7x-3x+33-9)=5x+15

2(4x+24)=5x+15

8x+48=5x+15

3x=33

x=33:3

x=11

Answer 2

2{7x-3[3(x+1)-2(x+4)]-9}=5(x+3)
2[7x-3(3x+3-2x-8)-9]=5x+15
2[7x-3(x-5)-9]=5x+15
2(7x-3x+15-9)=5x+15
2(4x+6)=5x+15
8x+12=5x+15
8x-5x=15-12
3x=3
x=1