3a-3[7+5a]=-9[2+a]

Simple and best practice solution for 3a-3[7+5a]=-9[2+a] 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 3a-3[7+5a]=-9[2+a] equation:


Simplifying
3a + -3[7 + 5a] = -9[2 + a]
3a + [7 * -3 + 5a * -3] = -9[2 + a]
3a + [-21 + -15a] = -9[2 + a]

Reorder the terms:
-21 + 3a + -15a = -9[2 + a]

Combine like terms: 3a + -15a = -12a
-21 + -12a = -9[2 + a]
-21 + -12a = [2 * -9 + a * -9]
-21 + -12a = [-18 + -9a]

Solving
-21 + -12a = -18 + -9a

Solving for variable 'a'.

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

Add '9a' to each side of the equation.
-21 + -12a + 9a = -18 + -9a + 9a

Combine like terms: -12a + 9a = -3a
-21 + -3a = -18 + -9a + 9a

Combine like terms: -9a + 9a = 0
-21 + -3a = -18 + 0
-21 + -3a = -18

Add '21' to each side of the equation.
-21 + 21 + -3a = -18 + 21

Combine like terms: -21 + 21 = 0
0 + -3a = -18 + 21
-3a = -18 + 21

Combine like terms: -18 + 21 = 3
-3a = 3

Divide each side by '-3'.
a = -1

Simplifying
a = -1

See similar equations:

| -2t^2-6t-9=0 | | -3t+7=0 | | 2(y-5)=7y+19 | | 4/n=8/14 | | x^2=56.25 | | 100=5x-20 | | 6tons=lb | | 4x-(-6.3)=2.7 | | -x+1=x+3 | | x^2-30x= | | 5+5n=26-1(6-4n) | | y=21-(2*1) | | 5d-9=-23 | | 0+x*y=z | | 5+5n=26-(6-4n) | | 2(y-3)+7y=19 | | 7*9=A | | X-y^2=3y | | 4(6x-4)=-5(12x+9) | | 3x+5=6x-5 | | 15=2/3y+6 | | 96=(2x)(4x) | | 3x=9+4x | | 17/17 | | 6v^2-78v-252=0 | | 2x^2-3x/x/8x-4 | | 17/2 | | (-2+x)(x+5)=9x-10 | | t=s-4/7 | | 4x-10=35 | | P=3*99+57 | | -3=-2/3z |

Equations solver categories