3(x+5)+4(x+5)=21

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


Simplifying
3(x + 5) + 4(x + 5) = 21

Reorder the terms:
3(5 + x) + 4(x + 5) = 21
(5 * 3 + x * 3) + 4(x + 5) = 21
(15 + 3x) + 4(x + 5) = 21

Reorder the terms:
15 + 3x + 4(5 + x) = 21
15 + 3x + (5 * 4 + x * 4) = 21
15 + 3x + (20 + 4x) = 21

Reorder the terms:
15 + 20 + 3x + 4x = 21

Combine like terms: 15 + 20 = 35
35 + 3x + 4x = 21

Combine like terms: 3x + 4x = 7x
35 + 7x = 21

Solving
35 + 7x = 21

Solving for variable 'x'.

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

Add '-35' to each side of the equation.
35 + -35 + 7x = 21 + -35

Combine like terms: 35 + -35 = 0
0 + 7x = 21 + -35
7x = 21 + -35

Combine like terms: 21 + -35 = -14
7x = -14

Divide each side by '7'.
x = -2

Simplifying
x = -2

See similar equations:

| x^4-5x+6forx=-3 | | -8(.1x+.4)-1.1=-.3 | | 2t-14-4t=70 | | 6z-1=21 | | 8x^6-17x^4+17x^3= | | 2t+8-t=-13 | | 3X^2+18X=-15 | | .5x-.2(3-5x)=-.4(x-8) | | -7(-3a+2)=-2a+9(2a-6) | | 8w=2480 | | -4x-7=-25 | | 192=1200+12n-6n^2 | | C=1200+12n-6n^2 | | 500=1000+5n-4n^2 | | 4y^2-(4-4y+y^2)-11=0 | | (-3x+15)2=0 | | 8x-9=-x^2 | | 200=1200+10n-2n^2 | | in(-x)-in(8)=1 | | 4z^2-24=0 | | 45x^2-69x+12=0 | | -8x-14=10 | | 7x(4x+13)=0 | | 3-4t=16t^2 | | 3x+5z=0 | | 15t^4+22t^2-5=0 | | 7(n+7)=10(n+7) | | 8+12x+4y= | | 14+g=31 | | 49=9b^2 | | 0.143x=1 | | 2x^2-2mx+m-1=0 |

Equations solver categories