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a=12=5
We move all terms to the left:
a-(12)=0
We move all terms containing a to the left, all other terms to the right
a=12
| 6=s+7 | | 2(3m+4)=4(2m+5) | | 12-(2x-4)=6x | | 11x+7=-23 | | 2t+4=13t+6(t-5) | | 3c=64-5c= | | 12x-1+9x-15=0 | | 9x+27=-5 | | n/6-4= | | 4x-10+2x+60=180 | | 8w−8=16 | | 11w=24 | | 28+6r=76 | | 200-6x=80x-750 | | 92+(4+2x)+(x+18)=180 | | 30x+360=40 | | -2(x+(-2))=x-8 | | 3250/169=y/520 | | (2x-9)(2x+4)=180 | | 200-6x=8x-750 | | 12-6x=8x-5= | | 6w+15=–33 | | 0.12p/100=12 | | M=100w+12000 | | )3x+1=2x-5 | | z+9=z+9 | | (-2+6x)/2=0 | | 1=8x²+7x | | 5x–3=4x+7 | | (-2+6x)/2=x | | 9.2m-4.7-8.5m=63.5 | | 4(3+2x)+5(4-3x)=68 |