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3)5(a+8)=40
We move all terms to the left:
3)5(a+8)-(40)=0
We add all the numbers together, and all the variables
3)5(a=0
| 0=-0.5x^2+36x-558 | | 7f–8f+4=5f–2 | | 9+10u=10u+9 | | (D-3D+2)y=0 | | (D-3^D+2)y=0 | | 2)a+7=15a | | 6n-7=7+6n | | 9s+6=9s-3 | | 10x+8=(2x+40)2 | | 12*5=4x*x | | 10x+8=(2x+40)/2 | | 1)12z+6=30 | | 6(8a+8)=672 | | 22-k5=17 | | P+3q=20 | | D^2-2D+1)y=0 | | 11x^2+110x+398=0 | | 10*6=x*8 | | (10)2y=25(5)-y | | 12/n=300 | | -3.4k+-7+3k+21=0 | | 0.35x+0.35x+282=x | | 4x+32=6x+16 | | 9d-2-3d=36 | | 25x^2-20=16 | | 2y+29=16y-1/2 | | 13d-2-3d=46 | | -1-0g=-2 | | 6d-3-36d=8 | | 3f+12=3(f-6) | | -1-0g=2 | | 8a-(5-a)=5a-17 |