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Simplifying 90 + 20d = 30 Solving 90 + 20d = 30 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-90' to each side of the equation. 90 + -90 + 20d = 30 + -90 Combine like terms: 90 + -90 = 0 0 + 20d = 30 + -90 20d = 30 + -90 Combine like terms: 30 + -90 = -60 20d = -60 Divide each side by '20'. d = -3 Simplifying d = -3
| 2-15+8-6= | | 15/8-3/8 | | 9/4-3/8 | | 2.5x+1=3x-4 | | 2/5x+7=8.32 | | 5x-15y=15 | | 2.5x+1=3d-4 | | 3x^2-4x/3x+4 | | -n+4=-12 | | 14-3[5t-12]=1-[20t+1] | | 6a^3-10a^2+3a-5= | | 3q-16q=7+2[-8q-3] | | 45/m=5 | | -45-22= | | 0=7[x-3] | | 11w=66 | | -3+8+(-2z)=-12 | | 12[5+2y]=4y-[6-9y] | | 6x+31=37x | | 45-9E=(-4+2e) | | 745-9E=5(-4+2E) | | 18+-5= | | 7[7c+1]-4c=13[3c-2] | | 3t-2/4=2t+1/3 | | n-16=7 | | n-16= | | 55+0.5m=200 | | 16-5[3t-4]=8[-2t+11] | | 05x+13= | | 4[x+7]=14 | | 55+0.5m=30 | | 10x+156=180 |