21/a=-7

Simple and best practice solution for 21/a=-7 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/a=-7 equation: 



21/a=-7

We move all terms to the left:

21/a-(-7)=0



Domain of the equation: a!=0

a∈R



We add all the numbers together, and all the variables

21/a+7=0

We multiply all the terms by the denominator


7*a+21=0

We add all the numbers together, and all the variables

7a+21=0

We move all terms containing a to the left, all other terms to the right

7a=-21

a=-21/7

a=-3

See similar equations:

| g-1.3=-4.5 | | -4(2x+5)=-308 | | -2x-(7)=11 | | (4x+84)+(11x+28)=180 | | -12x+30=6 | | -3(3x+4)=-453 | | 1=25x​ | | y-14/2=13 | | -9x+0.25(8x-12)=11 | | 2d-12=40 | | 16=-4(y+3)4) | | 180=80+x+61+x+55 | | 15x+-44=61 | | 672=-3x | | 12+8=6y | | 5x-20=3x+37 | | 0=-16t^2+760 | | 6x-7=-4+7 | | 11+9s=65 | | 10.5x+7=9-4.5x | | 180=11x-18+11x-18+40 | | 8=-8w+3(w-4) | | x+11=221 | | 3x-12=756 | | 13w-14w+15w-12w=-20 | | 12y+8=6y | | 2+5x-1=7x+1–2x | | 27.3=43y | | x=4=19 | | -9j+4j-15j=-20 | | 40/x+5=32/x-1 | | 5r-2=-2r-2 |

Equations solver categories