If it's not what You are looking for type in the equation solver your own equation and let us solve it.
r in (-oo:+oo)
r/10 = 3.5 // - 3.5
r/10-3.5 = 0
1/10*r-3.5 = 0 // + 3.5
1/10*r = 3.5 // : 1/10
r = 3.5/1/10
r = 35
r = 35
| 4k-10-11k=2(3k-5)-13k | | 4N=-28M | | 3s^2-2s-8= | | 4(7-12)=y-3 | | 3-(1-2x)=12+5x | | 5/3(9-w)=-15 | | 32+3t=5 | | 2x^3+11x^2-20x+7=0 | | 6x-2+3x=4+3(2x+6) | | 1/2(k-6)=-4 | | 18x-15-7x=25 | | 7.5w=1.5 | | 2=11z-5z | | F=9/5(n-98) | | 5r=4 | | 8y+2y-6=5y+5-4 | | 13=5-(13)+3a | | -77+5x=133-2x | | 3(m-6)=-15 | | 11x+4x=-165 | | 2(50)+8r=4(50+r) | | 3-8a+2a=-9-4a | | (2x)*6=168/2 | | -0.5(c-4.2)=6.4 | | 2y-3a(y-z)= | | 36=2a | | 3(3x-1)=16(x-2) | | 36+s=8(2s-3) | | 412+x-500=3 | | -3(2+x)+4x=6x-5(1+x)-3 | | 12-4(4-2d)= | | 15-(4m+7)=3+3m-16 |