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)
(-5/7)*x = 30 // - 30
(-5/7)*x-30 = 0
-5/7*x-30 = 0 // + 30
-5/7*x = 30 // : -5/7
x = 30/(-5/7)
x = -42
x = -42
| y=1/3x^2-4 | | 10x+17=-24+10 | | 3(2(2.9)-0.3)=19.4-(2.9) | | 5x-138=-2x+58 | | 5x+3(5x-10)=230 | | 11-5(6x-20)=81 | | bx=ab+bc | | 1/3x1/5 | | 3x+-20=5x+-130 | | 3x+b=13b | | 0.4x+0.5=-1.9-0.8x | | -15/8=-5y | | x+(x*.07)=90.42 | | -16=-4/3w | | 5d=(-35) | | 2(3x-4)-7=3x+1+1 | | 3-2p=-7 | | 5x^2-16x=45 | | 7.50x=12.50x | | -8x-63=29-4x | | 1m+3d=2.55 | | 7(2k+1)= | | 56n-24t= | | 1n-3n= | | 7(4k+1)= | | P=9s | | 4z^2-4z-1=0 | | 0.08(y-6)-0.06=0.04y-0.09(10) | | -58-6x=62-12x | | S+p=6 | | 4x-6(6x-5)=254 | | 5x+2=17x+2 |