21=2y+3

Simple and best practice solution for 21=2y+3 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=2y+3 equation:


Simplifying
21 = 2y + 3

Reorder the terms:
21 = 3 + 2y

Solving
21 = 3 + 2y

Solving for variable 'y'.

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

Add '-2y' to each side of the equation.
21 + -2y = 3 + 2y + -2y

Combine like terms: 2y + -2y = 0
21 + -2y = 3 + 0
21 + -2y = 3

Add '-21' to each side of the equation.
21 + -21 + -2y = 3 + -21

Combine like terms: 21 + -21 = 0
0 + -2y = 3 + -21
-2y = 3 + -21

Combine like terms: 3 + -21 = -18
-2y = -18

Divide each side by '-2'.
y = 9

Simplifying
y = 9

See similar equations:

| 8b+4=5b+9 | | 2x^2+22x+24=0 | | 15x+2=15x-2 | | -y+6z=-6 | | 2x-5=-17-2x | | 50+-6x=2 | | 2f+-9=14f+1 | | 17t+13t=420 | | 6(2x+8)=-10x+4 | | 7d+3=30 | | 1x^2+9x+1x^2+9x=180 | | 15x-10=10x-15 | | 7w-21=3w-3 | | c-d=7 | | 4mn=what | | 19x-10=13x+15 | | 2(4n-3)-8=2n+4 | | 8x-21-5x=-12 | | f(-2)=4x^3+5x^2-6x-4 | | 5-3a=a-3 | | 6x-14=9y | | 16x+20=13x+15 | | 663885765899x=20389x | | 0.3(x+70)+0.3x=30 | | 5x+x=5-7 | | -8z-5z=-z+1+5z | | 5x+8y=2800 | | 2x*8=21+7x | | 2x+8=21+7x | | 18x-10=20x+5 | | X+42+85=180 | | x^2+18x-180=0 |

Equations solver categories