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a-(-3=19
We move all terms to the left:
a-(-3-(19)=0
We add all the numbers together, and all the variables
a=0
| 13-3+h=19 | | 3(b+5)=15 | | a+10-4=37 | | 8x+1/7=2 | | 8x+1=2/7 | | n=15n=13 | | 10-4m=14 | | 3x+9+5x+6=59+4 | | x2-4x+4=49 | | (1-i)(2+4i)=0 | | N=15;n=13 | | 48=14x-x2 | | (2-3i)(4-6i)=0 | | 12y+30=18 | | (2-3i)(4-6i)=1 | | 28=16x-x2 | | 2/x+3+1/x=1 | | 7x=21=15 | | 7x=22=15 | | 54=3x+x2 | | 9a=36=8 | | 2/3b-1/6b=75 | | 54=x2=3x | | -1x-1=2x+8 | | 9y=30=11 | | 2b=90=30 | | 9m=32=28 | | 5c=2c-46 | | 3f=27=12 | | 44=x2-7x | | 5b=35=15 | | -16x-4x=2x+8 |