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21=3(2x
We move all terms to the left:
21-(3(2x)=0
| 4a+a-9=44 | | x2+14x-15=8x-9 | | 4c^2+10c=0 | | 4c^2+c=0 | | 3x+28+2x-10+5x+52=180 | | 6c-5-2c=15 | | x+44=3x-20 | | 6+3v=30 | | 2(3x+9)-2x=34 | | 6x^2+5=4 | | 3x+28=82 | | 3(-5y+3)=-36 | | 6^2+5x+4=0 | | 61x+3=25x+5 | | r+5=8+10 | | 9+r=4+8 | | -7x-48=4x+62 | | 35=w | | -2(x-3)+17x=36 | | 8x+2+3x+5=90 | | Y=2x=3 | | 8x+2+3x+5=180 | | x+3/4=11/2 | | 80/0.6x-40=15 | | x+5.25=7 | | 4x-4=2×+8 | | -10(x-5)=x | | 3/2x+1/2=2x-8 | | (3x8)1=3(8x1) | | 89-w=213 | | 64n=384 | | -10(x+5)=x |