(3/4)(8x+4x)+5y+4=(2/3)(12x+9)

Starting with the original expression

(3/4)(8x+4x)+5y+4=(2/3)(12x+9)

combine x's in first part

(3/4)(**12x**)+5y+4=(2/3)(12x+9)

multiply factors in first and last terms

**9x**+5y+4=**8x+6**

put all y's on left, x's and numbers on right

5y=-1x+2

divide by coefficient of y

y=-(1/5)x+(2/5)

The solution is the equation for a line with a y-intercept of 2/5 and a slope of -1/5