If it's not what You are looking for type in the equation solver your own equation and let us solve it.
c in (-oo:+oo)
2/7 = c/28 // - c/28
2/7-(c/28) = 0
2/7-1/28*c = 0 // - 2/7
-1/28*c = -2/7 // : -1/28
c = -2/7/(-1/28)
c = 8
c = 8
| -4(2r+-5)=44 | | -22=-6+4v | | 2x-1-2=11 | | 8=s-10 | | 6=0.15t+2 | | 2(-4+x)=-42 | | x/9=9/27 | | -sin^2(x)+cos^2(x)-5cos(x)-2=0 | | -8(6m-3)=-312 | | 73=1/3B*8 | | -2x+6x-17=4(x-4)-22 | | 11/10=22/x | | 3/(1(1/2)) | | -8(-2a-1)=26+7a | | 27=8u+40+5u | | (a+2)x=a^2+a-2 | | (a+2)x=a-2 | | -12y=-x+-20 | | (1/3)*9 | | 8(4x+7)+3=155 | | 8a^2=-12 | | -6+8m=154 | | 7x^3/4x^3/4 | | 4x+7=-3x-63 | | x^2-8x-49=0 | | 3m-2+4m=5 | | -42=6(-9+r) | | 3a-4b+2a+b= | | 6-6v-5v=-5 | | 8/4=3 | | 2(p+5)=40 | | y=-12x+-20 |