3x-y=21

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


Simplifying
3x + -1y = 21

Solving
3x + -1y = 21

Solving for variable 'x'.

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

Add 'y' to each side of the equation.
3x + -1y + y = 21 + y

Combine like terms: -1y + y = 0
3x + 0 = 21 + y
3x = 21 + y

Divide each side by '3'.
x = 7 + 0.3333333333y

Simplifying
x = 7 + 0.3333333333y

See similar equations:

| 2(x+3)=3x+3 | | x+23+x+61=180 | | 6-(2y+4)=12y-12 | | 13-2y=-7 | | 5-2(-5.5+2)=12 | | 4x-b=2x+c | | x+61=x+23 | | 7x-5=51 | | -3+2n=15 | | 5+2(x-1)=13 | | 0=36x^3-12x^2-5x+1 | | x+3=2x-61 | | p(x)=36x^3-12x^2-5x+1 | | 3x+21=x+57 | | 5x+30=12x+10 | | 4k+7=-9 | | x+34=2x-12 | | y=131 | | y+x=131 | | y+131=x | | 5t-8=-28 | | 17.2+4x=19.2 | | 12k-14=-19k+20 | | x-1.9=2.2 | | x+3(2-x)=2 | | -3(x-2)=9 | | -x+5(x+2)=10 | | -49y+9=12-4y | | x-2.5=1.6 | | 0=2X^2-9X-12 | | -2(x-1)=6 | | 6+2(6)=18 |

Equations solver categories