21-x-3=y

Simple and best practice solution for 21-x-3=y 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-x-3=y equation:


Simplifying
21 + -1x + -3 = y

Reorder the terms:
21 + -3 + -1x = y

Combine like terms: 21 + -3 = 18
18 + -1x = y

Solving
18 + -1x = y

Solving for variable 'x'.

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

Add '-18' to each side of the equation.
18 + -18 + -1x = -18 + y

Combine like terms: 18 + -18 = 0
0 + -1x = -18 + y
-1x = -18 + y

Divide each side by '-1'.
x = 18 + -1y

Simplifying
x = 18 + -1y

See similar equations:

| 9x+8=x^2 | | 5x+38=53 | | (3x+7)=360 | | x+1(5x+3)=59 | | x-21=-7 | | x+1(5x+2)=59 | | 2(5-3x)=-3(x-2) | | -2(x-7)-(9+5x)= | | x+1(5x+2)=9 | | 10+10w=8w+1 | | 43x=0 | | 45+x=51 | | x-8/2x-4 | | 4p^2-7=73 | | 5-3a=10 | | X/7-5=15 | | h=-16t^2+95t | | graphx=-7 | | 120=x-8/2x-4 | | 6x+14=9x-4 | | 5x-11=27-2(x+2)+7x | | 3.75x=7 | | -28+z=-54 | | (-4x)^2/(-2x^3) | | -18+y=14 | | 9x-8=-9x | | -0.4(y+3)= | | 30x^4-60x^3+30x^2=0 | | 14+4+3-3-4= | | 5(x+80)-4(x-20)=5x | | P(t)=5t^2-20t | | X-78=98 |

Equations solver categories