3x + 6x × 2 = 45, (x + 26) × 2 + 4x = 274,

3x + 6x × 2 = 45, (x + 26) × 2 + 4x = 274,

3x+6x×2=45
3x+12x=45
15x=45
x=45÷15
x=3
(x+26)×2+4x=274
2x+26×2+4x=274
2x+4x=274-52
6x=222
x=222÷6
x=37