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20+2r=2(r+10
We move all terms to the left:
20+2r-(2(r+10)=0
| 23+x=16x4 | | 3x-1/2=2x+1/3 | | 9(m-7)=-63+9m | | 4.8x+35.7=12.7-6.7x | | 3x+(-3)+2x=3x+x+(-9) | | 5+4x=11.8 | | 9x-25-8=0 | | 12m+50=74.90 | | 9x+12=4x-1+20 | | (3x-5)^2-8=0 | | 6x+100=2x+4 | | 10x+20x-9+5=-6x+5-9 | | 2x+(-6)+5(-x)=2(-x)+4 | | 5x+10=2-2x+10(x-3) | | Y=x+7;(1,6) | | Y-300x=600 | | 12m+150=136.90 | | 12m+150=136.30 | | 5+2x-1=7x+22-3x | | 12m+150=138.30 | | 12m+150=138.90 | | 12m+150=138.80 | | 12.8=x+14.042-1.19x | | 12m+50=138.80 | | Y=100+.25xX | | |4x+5|=|x+23| | | 18z-18=z-2= | | 8=(n+4)/3 | | 0.5x+0.75=4x-9.85 | | 8=(n+4)|3 | | 18z-18=z-2 | | 7z+1/8=8z+5/8 |