9x-5-4(x-5)=0 9x-5-4x+20=0 5x+15=0 5x=-15 x=-15/5 x=-3 5(2+3y)-4=7y-10 10+15y-4=7y-10 15y-7y= -10-10+4 8y= -16 y=-16/8 y=-2