your equation is (7x+4) + x = 92. combine like terms, getting 8x + 4 = 92. then, subtract by four on each side, getting 8x = 88. to get the x alone, you have to divide by 8 on both sides, therefore, x = 11. then, plug 11 into 7x+4 to get your second number. 7x11 = 77, 77+4 = 81. 81 + 11 = 92.