21-2b=15

Simple and best practice solution for 21-2b=15 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 21-2b=15 equation: 


Simplifying
21 + -2b = 15

Solving
21 + -2b = 15

Solving for variable 'b'.

Move all terms containing b to the left, all other terms to the right.

Add '-21' to each side of the equation.
21 + -21 + -2b = 15 + -21

Combine like terms: 21 + -21 = 0
0 + -2b = 15 + -21
-2b = 15 + -21

Combine like terms: 15 + -21 = -6
-2b = -6

Divide each side by '-2'.
b = 3

Simplifying
b = 3

See similar equations:

| 9.5y=76 | | 5y-8x=61 | | 6y-9x=27 | | (-8-14)(y-3)=-2y-(y-5) | | 6x-92y=27 | | 6(3x+12y)=500 | | 17=11+6(x-10) | | 20x^3-16x^2+25x-20=0 | | 9y-5x=-37 | | 2(y+1)-3(y-2)= | | -3+[11+(-8)]= | | 7-7a+3=2(6-4a) | | 5+2(5x-4)=5-4(2x+1) | | Z-3z=8z-8-z | | -8=7w-1 | | Px=x+5 | | -26=4-6u | | 0.06x-5.09=-4.79 | | 3x+(x-7)=12 | | 6x-5.09=4.79 | | -18=-16(y+9) | | 11-1(x+2)=-2(3-x) | | 56+13m=264 | | 29n-72=160 | | 3px^2+x-2p-7=0 | | 0.18y+0.06(y+9000)=2700 | | 0.3(x+30)+1.3x=73 | | 4v-v=9 | | 3(x-6)+6=5x+4 | | 42=14x-7x | | 2x-12=4c | | 33-8x=16+9x |

Equations solver categories