-3(a+5)+2a=a-21

Simple and best practice solution for -3(a+5)+2a=a-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 -3(a+5)+2a=a-21 equation:


Simplifying
-3(a + 5) + 2a = a + -21

Reorder the terms:
-3(5 + a) + 2a = a + -21
(5 * -3 + a * -3) + 2a = a + -21
(-15 + -3a) + 2a = a + -21

Combine like terms: -3a + 2a = -1a
-15 + -1a = a + -21

Reorder the terms:
-15 + -1a = -21 + a

Solving
-15 + -1a = -21 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-15 + -1a + -1a = -21 + a + -1a

Combine like terms: -1a + -1a = -2a
-15 + -2a = -21 + a + -1a

Combine like terms: a + -1a = 0
-15 + -2a = -21 + 0
-15 + -2a = -21

Add '15' to each side of the equation.
-15 + 15 + -2a = -21 + 15

Combine like terms: -15 + 15 = 0
0 + -2a = -21 + 15
-2a = -21 + 15

Combine like terms: -21 + 15 = -6
-2a = -6

Divide each side by '-2'.
a = 3

Simplifying
a = 3

See similar equations:

| 6x+11=13-9x | | 49-3x=13-9x | | 3x+253=12x-8 | | 3x+-20=7 | | 6x*x-5x-4=0 | | 6x*x-5x-4=0 | | x-103=77-11x | | 3d+6+7+6d= | | 4s^2+11s+3=0 | | -123+12x=149-5x | | -1+2x=-3+16x | | 7+5x=11+x | | 3066=7x+.20(7x) | | x(7x+1)(x-5)=0 | | y=y+9+4 | | 50-4x=8-10x | | 6x+8=-62-4x | | 4+3x=4+x | | -154+5x=-9x+70 | | 4x+8=51+2x+3 | | 3x-20=2x+8 | | X^2-4x-93=0 | | x-25.6=8 | | f(x)=(x^2+11x+7)(5x^4-3x^2) | | 12m-4=20+6 | | |10-4x|=32 | | 98=3a-10a | | 6x+162=13x-6 | | 2x-7=-5(5x-4) | | 3+55x=33x+15 | | -1+2x=-4+11x | | 46-3x=14-7x |

Equations solver categories