If it's not what You are looking for type in the equation solver your own equation and let us solve it.
k in (-oo:+oo)
k/4 = 3 // - 3
k/4-3 = 0
1/4*k-3 = 0 // + 3
1/4*k = 3 // : 1/4
k = 3/1/4
k = 12
k = 12
| 4x^2+12w+9=49 | | 18x^2-66x-252=0 | | u-4=15 | | a*3+4=10 | | y^2+10y+25-x^2=0 | | -6-7=6x+10-5x | | -32+5(12)= | | 1-n-2n=1-2n-n | | -32+5(4)= | | 3.29=3x-7 | | 1/2t-3/4=11/8 | | 2n-n=2n-3n | | 8x+1-7x=10 | | 6x+132=2x+15 | | 18+27x+15x^2=0 | | 7x+7-2x=2 | | 6x+(-6x)+10=1 | | 4j=18.92 | | 7.5m+15=75 | | 42-2(x)=4 | | -6=6x-7x+3 | | c-11=4 | | 0.8r=6.4 | | -x-6+4x=24 | | (8x-42)= | | 4(m+1)=6m+1 | | j/2=2.5 | | 2x+8+2x=28 | | Y-1/4=-4/5 | | 50-4(x)=2 | | Kx^2-20x+6k+1=0 | | 50-4(8)= |