If it's not what You are looking for type in the equation solver your own equation and let us solve it.
20(2x+5)=420
We move all terms to the left:
20(2x+5)-(420)=0
We multiply parentheses
40x+100-420=0
We add all the numbers together, and all the variables
40x-320=0
We move all terms containing x to the left, all other terms to the right
40x=320
x=320/40
x=8
| 10x+11=3x^2+3x+5 | | -3/w=-6 | | x-5x=11-3 | | 12n=+12 | | -2x+9=-12 | | −4(2x−1)=36 | | 8(b+1)+4=3(2b-8)16 | | 4-2n^2=0 | | m^2-22=3 | | -7-49n+4=-297 | | 30=7x-3x-10 | | 9=10+b/8 | | -7-8(1-2x)=113 | | 2n^2+14=0 | | 2y-6/4y-8=1 | | -5=-3x11x | | (2x)(2x)+3=122 | | 2b^2+6=0 | | 19=-3n-5 | | 72/84=x/7 | | 2x+7+x=3(x+1)+4,x | | (15x-12)/25x=0.2 | | (2x)^2+3=122 | | -177+10x=-x+87 | | 8x^2-80x+16=0 | | b^2-5b-27=-3 | | 27x^2+9x+5=0 | | 6(x-1)+1=3(x+1)-8,x | | 71=-4-5n | | x^2+10x=21=0 | | 29-32x=92 | | 6x-4=4(x-1)+2,x |