If it's not what You are looking for type in the equation solver your own equation and let us solve it.

-r+10=9r-10

We move all terms to the left:

-r+10-(9r-10)=0

We add all the numbers together, and all the variables

-1r-(9r-10)+10=0

We get rid of parentheses

-1r-9r+10+10=0

We add all the numbers together, and all the variables

-10r+20=0

We move all terms containing r to the left, all other terms to the right

-10r=-20

r=-20/-10

r=+2

| 9.78+3.5u=-9.11+0.6u-0.25 | | 2x-(3x-8)=2 | | 8x^2-30x+45=0 | | 8x(2-30x+45=0 | | 7(6x=54) | | 8h+1=10+9h | | Q=1/2p+3 | | 7c+2+10c=-10c+2 | | 2x/2.8=8.2 | | 2t+10=4t-8 | | -10y+9=-7y-5y+9 | | -m+3=m-7 | | 3x+12=3x+25 | | 4x^-3+1=0 | | 6.4g+4=3.4g+10 | | -10d-1+3D=-d-1 | | 2.8/x=35 | | 8+f=-5f-10 | | 8-5h=-9h | | 5+8=18(3?x)?5+8=18 | | 3x+2(-12)=64 | | -4.1=8.7+y/8 | | 4x+14=5x+4=6x-3 | | -4.1=8.7=y/8 | | 2l+8=12 | | 77-3a=44 | | 2.7x=1.62 | | 5+19x?7?26x=?51 | | 5x+-10=3x+30 | | y+2(2.5)=15 | | 12(x-0,5)=4x-34 | | 10x+20/15=6 |

- Equations solver - equations involving one unknown
- Quadratic equations solver
- Percentage Calculator - Step by step
- Derivative calculator - step by step
- Graphs of functions
- Factorization
- Greatest Common Factor
- Least Common Multiple
- System of equations - step by step solver
- Fractions calculator - step by step
- Theory in mathematics
- Roman numerals conversion
- Tip calculator
- Numbers as decimals, fractions, percentages
- More or less than - questions