If it's not what You are looking for type in the equation solver your own equation and let us solve it.
7(r+8)=0
We multiply parentheses
7r+56=0
We move all terms containing r to the left, all other terms to the right
7r=-56
r=-56/7
r=-8
| 11x+4=35 | | 5m-8=6+4 | | N^2-n-126=0 | | 2m^2-98=2 | | 0=16-8a | | (3^x)=1.73 | | X^2+26x+106=0 | | 9x-2=10x+8 | | 6.5n-7.0=4.2-1.5n | | 4k-(7k-3)=5k-6 | | 6x-6/3=6 | | 2k²=-48 | | 3x+1+4x+5=90 | | 6(x-3)-10=6x-28 | | 2x+8=5(x-7)-3x | | -2(7-5x)+-2(3x-8)=3x-9(7x-6) | | 6x-5/9+6=4x/5 | | 18x-4=2x-6 | | 39=9-5x | | 3n^2+17n-1000=0 | | 3x+22=32 | | 32=2x+22 | | (6x+26)+(2x-9)=11x-31 | | 0=-16x^2-64x-40 | | 7x-4+6x-6=142 | | 6x-22+8x+34=90 | | 6x-22+8x+34=60 | | -4(9k-3)=12-36k | | 3(3x+2)=7x+6 | | 8=15x+9 | | -5(-7n+6)=-30+35n | | 1/32x+10=1/4x+54 |