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Simplifying 3d + -7 = 20 Reorder the terms: -7 + 3d = 20 Solving -7 + 3d = 20 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 3d = 20 + 7 Combine like terms: -7 + 7 = 0 0 + 3d = 20 + 7 3d = 20 + 7 Combine like terms: 20 + 7 = 27 3d = 27 Divide each side by '3'. d = 9 Simplifying d = 9
| d-15=42 | | 7a+17c-x= | | 7x+11=60 | | m*4-120=-96 | | 2t-3=7 | | 15x^2=40(x+2) | | 4m-7=2m+17 | | 3(8-4x-4x)+4(5x+4)=20 | | 3x^2-11x+50=0 | | 15-10y=-65 | | 30+5x=7x | | 14+5Y=50 | | 2(4+9)= | | x-5(x-2)=26 | | 4+3m=-2 | | 2a-2=x+6 | | 8x+19=5x+23 | | 6-x=1 | | 3-x=9 | | 3x+6y=12 | | 9x=81 | | -5(4x-2)=-2(33+6x) | | 10x-15x+5=-45+20 | | x-1.11x=7 | | 8+5(s+1)=18 | | 16x-8x-12=24+20 | | -5x=7+10 | | 0.4x+8=12 | | 4n+4=12 | | 0.167y=0.33 | | 2(t+5t)=48 | | -18=15-3(6j+5) |