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Simplifying 81 + -2n = 4n + 9 Reorder the terms: 81 + -2n = 9 + 4n Solving 81 + -2n = 9 + 4n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-4n' to each side of the equation. 81 + -2n + -4n = 9 + 4n + -4n Combine like terms: -2n + -4n = -6n 81 + -6n = 9 + 4n + -4n Combine like terms: 4n + -4n = 0 81 + -6n = 9 + 0 81 + -6n = 9 Add '-81' to each side of the equation. 81 + -81 + -6n = 9 + -81 Combine like terms: 81 + -81 = 0 0 + -6n = 9 + -81 -6n = 9 + -81 Combine like terms: 9 + -81 = -72 -6n = -72 Divide each side by '-6'. n = 12 Simplifying n = 12
| 21=14+x | | (81-2)xN=4xN+9 | | 0.1x-0.75(5-x)=4.7 | | 8(y+7)= | | 81-2xn=4xn+9 | | 4Q-(Q^2/200) | | 2x+9=3x+6+x | | (-7+7i)+(8-3i)=0 | | 5(b-3)=2(5b+3) | | 6Q-(Q^2/200) | | 44(23)1/5 | | 7n=7n | | 5x+0=95 | | x^2+176=27x | | y^-7/y^-8 | | Q^2/200 | | -2(7x-5)=-14x-10 | | -15=y/3 | | 2/-5×-9/3(-8) | | 2/-5×-9÷3(-8) | | 8/7d-5/4d | | -2x-1=x | | -12=-2/7u | | 8/7d-5/4d=0 | | 11x-58-7x=42 | | -35+7n=7n-35 | | 2(3x+12)=-5 | | 4/5x-6/7x=61/30 | | (2y-5x-3)(y+3x)= | | 2(y+1)=4(4-2.25y) | | (4/5)x-(6/7)x=61/30 | | 7x-35=35-7x |