7(3+a)-4(3a+1)=9-a

Simple and best practice solution for 7(3+a)-4(3a+1)=9-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 7(3+a)-4(3a+1)=9-a equation:


Simplifying
7(3 + a) + -4(3a + 1) = 9 + -1a
(3 * 7 + a * 7) + -4(3a + 1) = 9 + -1a
(21 + 7a) + -4(3a + 1) = 9 + -1a

Reorder the terms:
21 + 7a + -4(1 + 3a) = 9 + -1a
21 + 7a + (1 * -4 + 3a * -4) = 9 + -1a
21 + 7a + (-4 + -12a) = 9 + -1a

Reorder the terms:
21 + -4 + 7a + -12a = 9 + -1a

Combine like terms: 21 + -4 = 17
17 + 7a + -12a = 9 + -1a

Combine like terms: 7a + -12a = -5a
17 + -5a = 9 + -1a

Solving
17 + -5a = 9 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
17 + -5a + a = 9 + -1a + a

Combine like terms: -5a + a = -4a
17 + -4a = 9 + -1a + a

Combine like terms: -1a + a = 0
17 + -4a = 9 + 0
17 + -4a = 9

Add '-17' to each side of the equation.
17 + -17 + -4a = 9 + -17

Combine like terms: 17 + -17 = 0
0 + -4a = 9 + -17
-4a = 9 + -17

Combine like terms: 9 + -17 = -8
-4a = -8

Divide each side by '-4'.
a = 2

Simplifying
a = 2

See similar equations:

| -3(a+1)+2(9-2a)+6=0 | | 180=60-2x | | 16*2x=100 | | 56(100+6)= | | -2(4+x)+3(x-1)= | | 4t*7t=0 | | 60x-2+70-2x=180 | | x^2+x-398=0 | | 5(7f+5g)= | | 16x*2=100 | | (2.4+6.1)10= | | 9x+5+2x=17 | | 4x+5y=-26 | | .5e+.75e-e= | | 60+120-12x+10x+x=180 | | -8x-7y=22 | | -18x-7y=11 | | -9x+8y=17 | | cosx=-0.5 | | 11x^2-14x-16=0 | | (m-1)x^2-4mx+m-6=0 | | 2x^2-20x-3600=0 | | ln(2)-ln(1)=ln(2) | | 8y-15=15 | | 4(2x-1)+3x=40 | | 3x-2(1-x)=8andverify | | 2y+6g= | | 4kx^2-2(K+1)x+1=0 | | 3x-2(1-x)=8 | | 12+3+4+5+67-8+9=100 | | 1+2+3+4+5+67+8+9=101 | | 12+3+4+5+67+8+9=100 |

Equations solver categories