7x-y=-21

Simple and best practice solution for 7x-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 7x-y=-21 equation:


Simplifying
7x + -1y = -21

Solving
7x + -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.
7x + -1y + y = -21 + y

Combine like terms: -1y + y = 0
7x + 0 = -21 + y
7x = -21 + y

Divide each side by '7'.
x = -3 + 0.1428571429y

Simplifying
x = -3 + 0.1428571429y

See similar equations:

| -2x-3y=-14 | | 7c=3c+48 | | 27-y=16 | | 8x-y=16 | | x^8-2x^4+1=0 | | x=10-18 | | 50-12y=-22 | | 9x+12=-24 | | 72-40y=-24 | | x(63-7x)=42 | | 63x-7x=42 | | 9x+4y=-24 | | -x^3-3x^2+4=0 | | 2x^2-4x-8=0 | | 7+12x=106+x | | 6x+17=13x-53 | | 5x-16=34 | | 12x-182=4x-14 | | 42-6x=12x+20 | | 7-9x=117-44x | | 4x+8=-76-10x | | 142-6x=4x+12 | | -16-6x=14-9x | | -8-4x=7-9x | | 67-2x=8x+7 | | 2x-(x+1)=11 | | 6d+4=2d+24 | | x^2+0.1x+25=0 | | 12=6b-4 | | 5c-6=3x+4 | | 14g-11=45 | | 3b+5=2b+12 |

Equations solver categories