If it's not what You are looking for type in the equation solver your own equation and let us solve it.
q in (-oo:+oo)
7-(21*(q/3)) = 0
7-7*q = 0
7-7*q = 0 // - 7
-7*q = -7 // : -7
q = -7/(-7)
q = 1
q = 1
| Y=1/3x-39 | | 15-10*25+35= | | 4x+7y=364 | | x=1/2-2/5 | | 14-n=2 | | 2log(3x)+5=15 | | (x^4-3x^2-6)(x^2+3x-1)= | | 5b+b=240 | | ((3x^3y)^0)/(xy^4)*(1)/z^8) | | 12s+12=60 | | 16-n=1 | | X+2x+X-11+X+10+3x+X+18=360 | | 15w/5-9 | | ln(7-6x)=1 | | 12l+60=192 | | ln(6-7x)=1 | | x(d+c)=y | | 4a-40=20 | | x^3-4x^2-16x+28=0 | | y=-8x–5/3 | | x=29/cos(65) | | 10-2ln(7-6x)=8 | | 2q-6=18 | | (X+3)(x^2-4x+5)= | | 2y=4y+1 | | -(5x-9y+6z)= | | f(x)=x^4+7x^3-8x-56 | | 8-t=21t-17 | | 5(x+20)=7x+20 | | X-3-1=5 | | X^2-x+304=0 | | x/--6 |