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x-12+7=0
We add all the numbers together, and all the variables
x-5=0
We move all terms containing x to the left, all other terms to the right
x=5
| -8y+13=18y | | 3y-y=-20 | | -1/2x-4/3=-4/7 | | –7+8g=9g | | 4(x-5)-3=-3(-5x+9)-3x | | –10−9z=-10z | | 50+6x—31=4; | | |16+3x|=|2x+9| | | 9x=81x/9=81 | | 3(-2x+7)=-8x+29 | | –7w=–6−8w | | –2r+10=8r | | D=4A+m | | (2x-5)(x-1)=12x | | –9+4b=3b | | 3k+8=k | | 8x-7=5-2 | | 3x+2=8x-12 | | n²+10n-13200=0 | | 7c-8=13 | | 4n²=9 | | a+a+15=51 | | 56=32+4s | | 1x+1+2x+3=1115 | | 1x+9x+8=1 | | 5y-18+2y-43=51 | | -19=1-3m | | x2+x–6=6 | | 2x²+12x+20=x2 | | 8.9+1.2(3a-1)=4 | | b+4/2=b+10/3 | | 9x-15=-5+1/2 |