(X+7)(X+3)=21

Simple and best practice solution for (X+7)(X+3)=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 (X+7)(X+3)=21 equation:


Simplifying
(X + 7)(X + 3) = 21

Reorder the terms:
(7 + X)(X + 3) = 21

Reorder the terms:
(7 + X)(3 + X) = 21

Multiply (7 + X) * (3 + X)
(7(3 + X) + X(3 + X)) = 21
((3 * 7 + X * 7) + X(3 + X)) = 21
((21 + 7X) + X(3 + X)) = 21
(21 + 7X + (3 * X + X * X)) = 21
(21 + 7X + (3X + X2)) = 21

Combine like terms: 7X + 3X = 10X
(21 + 10X + X2) = 21

Add '-21' to each side of the equation.
21 + 10X + -21 + X2 = 21 + -21

Reorder the terms:
21 + -21 + 10X + X2 = 21 + -21

Combine like terms: 21 + -21 = 0
0 + 10X + X2 = 21 + -21
10X + X2 = 21 + -21

Combine like terms: 21 + -21 = 0
10X + X2 = 0

Solving
10X + X2 = 0

Solving for variable 'X'.

Factor out the Greatest Common Factor (GCF), 'X'.
X(10 + X) = 0

Subproblem 1

Set the factor 'X' equal to zero and attempt to solve: Simplifying X = 0 Solving X = 0 Move all terms containing X to the left, all other terms to the right. Simplifying X = 0

Subproblem 2

Set the factor '(10 + X)' equal to zero and attempt to solve: Simplifying 10 + X = 0 Solving 10 + X = 0 Move all terms containing X to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + X = 0 + -10 Combine like terms: 10 + -10 = 0 0 + X = 0 + -10 X = 0 + -10 Combine like terms: 0 + -10 = -10 X = -10 Simplifying X = -10

Solution

X = {0, -10}

See similar equations:

| 3x+5y+7= | | 7+sqrt(0.5-x)=sqrt(2-4*x) | | -a-5/4(8/3a+1)=-19/4 | | (5X-3)(2X+1)=46-X | | 8x+19=6x+73 | | -5/2=y/9 | | 67-7x=2x+24 | | 15x-5-14x+28=35 | | -3.5/2= | | x^4-13x^2=48 | | J/3=25/15 | | 2a=-3.5 | | A/100=2/25 | | 1/x=3/6 | | 1/7=4/b | | 14/w=7/9 | | 16/5=k/20 | | 20/19=120/v | | M/12=3/2 | | C/22=4/11 | | 4.75+1.25= | | 6e-7=4e+5 | | (x^2+6x+6)(x^2+x+6)=6x | | 1/9*120b | | 0.30=x/30 | | 4(y+2)=5(y-1)-6 | | 3v^2+36v+60=0 | | y=10x-120 | | (7.9*10^17)/(5*10^15) | | (7.9*10^17)/ | | X(100-2x)(80-x)=v | | 4x^-2/3=1/9 |

Equations solver categories