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)
(5/2)*x-15 = 2*x+6 // - 2*x+6
(5/2)*x-(2*x)-15-6 = 0
(5/2)*x-2*x-15-6 = 0
1/2*x-21 = 0 // + 21
1/2*x = 21 // : 1/2
x = 21/1/2
x = 42
x = 42
| 5y-9+y+35=6y+30-4y | | 12x^2-18x+4=0 | | 2(3t+1)-4=t-(t+1) | | 2(2c-1)-2=2c+2 | | 3x+4=8x-9 | | 7X^2+6X-6=0 | | -(3-q)=-1/2(6q-26) | | 4x+7=71-5x | | 0=8x^3-64x^2+x-8 | | 5x+31=15-49 | | 4x+3(2x+7)=-10 | | 10x^2+22x+12=0 | | -12n-9=27 | | 4x+2(x+3)=8x+12 | | 2x+4=4x-20 | | 50+4y-15=17y-13-5y | | 18=x+4/5x | | 8-7x=x+16 | | -12-(-7x4)+12/(-3+1) | | x+24+3x=-17-3x-22 | | 5-3(6t-2)=2(7-9t) | | 12-z=28 | | 3i-(-6i)= | | 3(2x-1.9)=4x-5.7 | | -9x-21=8x-6 | | (x^2+6)^2/3 | | (14/19)=(x/19) | | 1/3=m/6 | | 0=x^2-60x+800 | | 4x+9/3=11 | | 4-(2-5x)=0 | | 4(e+3)=a-15 |