21=15+3(3-1)

Simple and best practice solution for 21=15+3(3-1) 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 21=15+3(3-1) equation: 


Simplifying
21 = 15 + 3(3 + -1)

Combine like terms: 3 + -1 = 2
21 = 15 + 3(2)

Multiply 3 * 2
21 = 15 + 6

Combine like terms: 15 + 6 = 21
21 = 21

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

Combine like terms: 21 + -21 = 0
0 = 21 + -21

Combine like terms: 21 + -21 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

See similar equations:

| (6x+3)-(-4x^2-5x+3)= | | 7.8/15 | | y^5/10*y^3/10 | | a^2+3a-42=0 | | .38x+.44*7=.40*x+7 | | .38x+.44*7=.40*x+7 | | b^2c^5/bc^3 | | 7.8/15 | | (6x+3)-(-4x^2-5x+3)= | | .38x+.44*7=.40*x+7 | | 20x+100=180 | | (6x+3)-(-4x^2-5x+3)= | | 22=10y+3-3y | | 20x+100=180 | | 2r-7z=45 | | 12+x=90 | | 3(-14+18p)= | | 2x+10+7x=118 | | 2z+3z=30 | | -3x^2-6x=10 | | 2/5*x=12 | | 20-5c=3c+8 | | 3.6-y=-10 | | 6x/5x-25 | | x/4=25/100 | | 21=15+3(2-1) | | 30x-42=14x | | v/-80 | | 42y^8+7y^3=0 | | -2+2y=-3x | | 95.30=.55x+19.95 | | -2(x+1)=-2x+-2 |

Equations solver categories