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Simplifying 20 = 7(7n + 6) + 8(1 + -8n) Reorder the terms: 20 = 7(6 + 7n) + 8(1 + -8n) 20 = (6 * 7 + 7n * 7) + 8(1 + -8n) 20 = (42 + 49n) + 8(1 + -8n) 20 = 42 + 49n + (1 * 8 + -8n * 8) 20 = 42 + 49n + (8 + -64n) Reorder the terms: 20 = 42 + 8 + 49n + -64n Combine like terms: 42 + 8 = 50 20 = 50 + 49n + -64n Combine like terms: 49n + -64n = -15n 20 = 50 + -15n Solving 20 = 50 + -15n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '15n' to each side of the equation. 20 + 15n = 50 + -15n + 15n Combine like terms: -15n + 15n = 0 20 + 15n = 50 + 0 20 + 15n = 50 Add '-20' to each side of the equation. 20 + -20 + 15n = 50 + -20 Combine like terms: 20 + -20 = 0 0 + 15n = 50 + -20 15n = 50 + -20 Combine like terms: 50 + -20 = 30 15n = 30 Divide each side by '15'. n = 2 Simplifying n = 2
| 11x-3x+5=29 | | 9(7x-10)=414 | | 8(5+6x)+5(6x+6)=70 | | -11x=42-4x | | -6(-4x+5)=162 | | -(4x+7)=-2+4x | | x^3-x-x^2+3=0 | | Z+6=11 | | (7y+26)(4y+7)=0 | | 8(5x+10)=520 | | 93/100=77/x | | (w+5)(w-4)=-8 | | 5.7(-1.2+2.7n)=96.273 | | 8p^3-12p^2+2p+1=0 | | 7(7x-10)=518 | | 77=93%x | | 142.216=4.923r+5.3(-5.1r+7.646) | | 93/x=77 | | x^2-23=2 | | -12x=5-8y | | 3a+3(7)=-3 | | 4x2-3/2(-1) | | 7x-2(x+3)=4y-x | | 2(1.28)+6b=12 | | 5(8x+6)=430 | | -3ax+6ay=0 | | 0.20x+0.35(30)=27.5 | | 3a+8=5a+24 | | -7(8p+2)=434 | | 80+20x=90+18x | | -185=5(-7a-2) | | 12.4-2.8(x+3)=12.8 |