If it's not what You are looking for type in the equation solver your own equation and let us solve it.
71-20=i
We move all terms to the left:
71-20-(i)=0
We add all the numbers together, and all the variables
-1i+51=0
We move all terms containing i to the left, all other terms to the right
-i=-51
i=-51/-1
i=+51
| -7-13m-16=1 | | 5-7v=5-7v | | 7x+4=49+4x | | x-20+x+14+x-10+x+21+42+29=360 | | X+7-7-3=-2x+6 | | 0=6+y2 | | -7-5a-1=-8-6a+a | | -6k+15=-3k-8k | | 1/2(4x+2)=5x+4 | | 79=2r-7(-3r-8) | | 3^x+2+3^x+4=810 | | -42=-7(6+6x) | | 13+3x-x=2x-5 | | 15x-7+72°=95° | | 5(2q-3)=10q-12 | | (15x-7)°+72=95° | | 8(6+8n)=-80 | | -2x-6(2x-16)=-72 | | 7x+(2x-1)=9x+7 | | 6x+13=x-12 | | 5=5+8(p+6) | | 4x-5(-4x-9)=-171 | | -5n-3=-4-5n | | 7x+(2x+7)=9x+1 | | -7x+7(2x+16)=42 | | -5x+1=-8x-11 | | 1/3x+2/5=17 | | 7x+12.4=121.6 | | 7x+12=121.6 | | -11+7x=1+6x+7x | | 6x-2(7x-9)=90 | | 2(8+c)=48 |