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2a+a=2a
We move all terms to the left:
2a+a-(2a)=0
We add all the numbers together, and all the variables
a=0
| 2a/4=10 | | (7x+3)/2=(9x-8)/4 | | y2-56=200 | | 3v1+10=67 | | q2+50=450 | | 3p2-400=275 | | c2+10=110 | | 10x+4=34(x=3) | | m-28/5-6m-37/7=1 | | y2-100=96 | | 3x+2x=4x+4x | | 4q1+5=65 | | r2+10=131 | | x2−10x+25=200 | | 5x-3(x-10)=30 | | 7(x+5)+2=7x+2 | | 15x-4(3x-1)=22 | | 20-4(x+1½)+3(12-2x)=0 | | `2p+12=14` | | -3h=-81 | | X²+(y-5)²=36 | | 4a-2a=52 | | f-22=8 | | 3x-4/18+x=3x+4/3+1 | | n-40=-15 | | q+12=24 | | 4a2+3a+36=8a2+3a | | (2y)/(y+2)=6-4/(y+2) | | -6h+10=-4h | | (3x+8)-(2x=12) | | 240=8(-8x+6) | | 4a+3a+36=8a+3a |