21a^2+13a=2a+7a^2+15

Simple and best practice solution for 21a^2+13a=2a+7a^2+15 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 21a^2+13a=2a+7a^2+15 equation:


Simplifying
21a2 + 13a = 2a + 7a2 + 15

Reorder the terms:
13a + 21a2 = 2a + 7a2 + 15

Reorder the terms:
13a + 21a2 = 15 + 2a + 7a2

Solving
13a + 21a2 = 15 + 2a + 7a2

Solving for variable 'a'.

Reorder the terms:
-15 + 13a + -2a + 21a2 + -7a2 = 15 + 2a + 7a2 + -15 + -2a + -7a2

Combine like terms: 13a + -2a = 11a
-15 + 11a + 21a2 + -7a2 = 15 + 2a + 7a2 + -15 + -2a + -7a2

Combine like terms: 21a2 + -7a2 = 14a2
-15 + 11a + 14a2 = 15 + 2a + 7a2 + -15 + -2a + -7a2

Reorder the terms:
-15 + 11a + 14a2 = 15 + -15 + 2a + -2a + 7a2 + -7a2

Combine like terms: 15 + -15 = 0
-15 + 11a + 14a2 = 0 + 2a + -2a + 7a2 + -7a2
-15 + 11a + 14a2 = 2a + -2a + 7a2 + -7a2

Combine like terms: 2a + -2a = 0
-15 + 11a + 14a2 = 0 + 7a2 + -7a2
-15 + 11a + 14a2 = 7a2 + -7a2

Combine like terms: 7a2 + -7a2 = 0
-15 + 11a + 14a2 = 0

Factor a trinomial.
(-3 + -2a)(5 + -7a) = 0

Subproblem 1

Set the factor '(-3 + -2a)' equal to zero and attempt to solve: Simplifying -3 + -2a = 0 Solving -3 + -2a = 0 Move all terms containing a to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -2a = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -2a = 0 + 3 -2a = 0 + 3 Combine like terms: 0 + 3 = 3 -2a = 3 Divide each side by '-2'. a = -1.5 Simplifying a = -1.5

Subproblem 2

Set the factor '(5 + -7a)' equal to zero and attempt to solve: Simplifying 5 + -7a = 0 Solving 5 + -7a = 0 Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -7a = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -7a = 0 + -5 -7a = 0 + -5 Combine like terms: 0 + -5 = -5 -7a = -5 Divide each side by '-7'. a = 0.7142857143 Simplifying a = 0.7142857143

Solution

a = {-1.5, 0.7142857143}

See similar equations:

| 3x-44+2x+12= | | 23x=-4x^2 | | 5+3(2x-1)=20 | | -2+7=-9 | | 4a(3a-2)=2(3a-2) | | C=120+5x | | 174=-3x-3(5x-4) | | 13+y=(43-y) | | 5c+11=11c-13 | | -3/4(16x_8)=2/9(27x-54) | | b/4-11=7 | | c^2-4a^2+4ab-b^2=0 | | -2(w-1)=-3w+5 | | (3+4i)-(1-5i)=0 | | 3x(5x+6)= | | 2(2x+7)=2x-18 | | 50p=2000+40p | | 7b+11=5b+33 | | X+1=2-(x-4)+3 | | -2x^2+18=-374 | | 10-6n=26+n | | 21x+1+144=167x-1 | | (3x-8)(4x^2-5x+2)= | | 2r+17=4r-7 | | 2.5x=x-8 | | 3(x+4)-6=2(x-5)+x+16 | | 3+5(5-x)=8 | | 9t=-10+9t | | 5x+2forx=3 | | 3=6x+4 | | 3/5*-4 | | -2x-3=6-12x |

Equations solver categories