5a-4(3a+7)=(-21)

Simple and best practice solution for 5a-4(3a+7)=(-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 5a-4(3a+7)=(-21) equation: 


Simplifying
5a + -4(3a + 7) = (-21)

Reorder the terms:
5a + -4(7 + 3a) = (-21)
5a + (7 * -4 + 3a * -4) = (-21)
5a + (-28 + -12a) = (-21)

Reorder the terms:
-28 + 5a + -12a = (-21)

Combine like terms: 5a + -12a = -7a
-28 + -7a = (-21)
-28 + -7a = -21

Solving
-28 + -7a = -21

Solving for variable 'a'.

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

Add '28' to each side of the equation.
-28 + 28 + -7a = -21 + 28

Combine like terms: -28 + 28 = 0
0 + -7a = -21 + 28
-7a = -21 + 28

Combine like terms: -21 + 28 = 7
-7a = 7

Divide each side by '-7'.
a = -1

Simplifying
a = -1

See similar equations:

| x+86+x+106=180 | | 45/16+3/2n=7/4n-19/16 | | 3(y-9)+4=16y-10 | | 4(3x+7)=-28+44 | | .3333x=x-22 | | 4x-2+5x+10+8x+21=180 | | -5(1+6p)=-5(-5+9p) | | 13-2a+20=48 | | 1523+p=2766 | | 146/20 | | 2x-90=3/4x | | (3n-8)=5+8 | | 12X^6-4X^4/2X^3 | | -5(1-8n)+6(-4-7n)=-35 | | X+14+x-38=180 | | 2y(3-x)+7(x-2y)= | | 4e+21= | | F(4)=(1/5) | | x^2+9x^2+220=0 | | 5x2/1 | | -6(2+4x)-8=7(-4x-4) | | y/5=2=-8 | | -1x=20 | | 3a-6=2(a+1)+9a+1 | | 2b-4=21 | | 3(2x-6)=2(3t-9) | | x/6=x/3-1 | | F(4)=3(4)-12 | | 4-3n+6=10 | | 7x-3=-x+8 | | -(-5/2x-3/2)=-3/2+x | | -1/2-(5x-9)=17 |

Equations solver categories