If it's not what You are looking for type in the equation solver your own equation and let us solve it.
13c+2c+3c-13c=20
We move all terms to the left:
13c+2c+3c-13c-(20)=0
We add all the numbers together, and all the variables
5c-20=0
We move all terms containing c to the left, all other terms to the right
5c=20
c=20/5
c=4
| 4^3x=170 | | 52=k+28 | | 20s+13-15=19s-17 | | (2x)^2/(1-x)^2=3.6 | | 10p+4p+77=9 | | 7^(x+6)=49^x | | -4+2x=-12=8x | | 6x+10=2080 | | -3y-2(4y)=12 | | 3x+11=-7-2x | | F(x)=-4/x-6 | | -2(4x-5)=74 | | -7+5x+7x=29 | | 7(3x-2)=238 | | 4x-15=8x+2 | | 9=5+a-2 | | 5x×2=7x-4 | | 4x/5=3/5x+3 | | 4(3x-2)=51 | | 2x+16=36+36-3x | | 27=-a+10 | | h+-(1.7)=2.2-3.4 | | 2=c÷0.75 | | h+-1.7=2.2-3.4 | | 41/6=31/3x | | 27=a+10 | | 9n+1=11 | | 21/7/(15a)=5/14/0.8 | | 6x-9=3x5 | | -3x+-10=25+4x^2 | | 9u=4u+30 | | 26=w/2 |