If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
(2/3)*(15*x+21*y) = 0
2/3*(15*x+21*y) = 0
15*x+21*y = 0 // - 21*y
15*x = -(21*y) // : 15
x = (-(21*y))/15
x = (-7*y)/5
x = (-7*y)/5
| 4(x-5)=180-y | | 11t-10t=30 | | 93/7*5/11*14/15 | | -x/9=2x/3-2/9 | | (2y^1/5)^4/y^1/3 | | -21(-c-12)=-2c-12 | | .25(8x-20)=.3333333333(15x-6) | | 2/(3-x)+1/(3+x)+1/(9-x^2)=0 | | 45x=96 | | 7*51/14 | | -x+2=32/196 | | -20=-4-s | | w=21/2 | | -2(6y-7)-y=-4(y-3) | | 2/5x-4-3=3x+1/2 | | d+3=-d-10-7/3 | | (x+9)/(x-2)=2/(x+2)+44/(x^2-4) | | 22/12-33/12 | | 0.5(4x+12)+2x= | | c+(5/9)(F-32) | | 6-x-3(2-5x)=12+8x | | 5/2x=-30 | | 22/12-31/12 | | .5*4= | | x=23x+43 | | (-x/9)=(2x/3)-(2/9) | | X/18=13.5 | | 2x-5x+7=x-9+16 | | (4/5n)+(8/2)=(7/4)+(2/5n) | | 54/10-73/10 | | 3x^3+26x^2+16x=0 | | 4-a=-16 |