If it's not what You are looking for type in the equation solver your own equation and let us solve it.
21=15+5b
We move all terms to the left:
21-(15+5b)=0
We add all the numbers together, and all the variables
-(5b+15)+21=0
We get rid of parentheses
-5b-15+21=0
We add all the numbers together, and all the variables
-5b+6=0
We move all terms containing b to the left, all other terms to the right
-5b=-6
b=-6/-5
b=1+1/5
| 43+90+b=180 | | 40m=5m | | 3x-5=-2x-4 | | n=14/4=1 | | 7p+7=6p | | x(x+9)=4x^2+5 | | 5(3x-7)-(2x-5)+2=3(2-x)-(x-5)+7 | | -5-1(-15x-1)=2(7x-16)-x | | -5-1(-15y-1)=2(7y-16)-y | | x^2+2x+4=x^2+x+10 | | y/9-1/2=5/18 | | x2=81,000 | | 3x-4x=-3 | | 22−-u=59 | | w+7-3=1 | | 3(7+2x)+3=3(5=x)-9(x+1) | | 2m+7=35 | | 3+1/2=5/9x | | 2x-10+4=3(4x-5)+2 | | 10x+14=42-3x | | 3/q+(-5)=8 | | -5(x+7)=5×+35 | | 5v-14=7(v-4) | | 6-(6x+6)+x=-20 | | 11q+5=10q-14 | | 34-4n=6(1-3n) | | 3x+4x-1=x-7+3 | | 9s−25=38 | | -10s-16=20-12s+4 | | v/3+12=28 | | (x²-2x-1)(-2x²+x+3)=0 | | 11t=20+7t |