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Simplifying (n + 4) * 3 = 21 Reorder the terms: (4 + n) * 3 = 21 Reorder the terms for easier multiplication: 3(4 + n) = 21 (4 * 3 + n * 3) = 21 (12 + 3n) = 21 Solving 12 + 3n = 21 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + 3n = 21 + -12 Combine like terms: 12 + -12 = 0 0 + 3n = 21 + -12 3n = 21 + -12 Combine like terms: 21 + -12 = 9 3n = 9 Divide each side by '3'. n = 3 Simplifying n = 3
| -(X-2)+1=2X+3(1-X) | | -6y-8=8y+20 | | 7n-27=43 | | -5(x-5)-27= | | 8x-(5x+6)=9 | | -5(x+6)-4=1-37 | | 16x-5=4+13x | | y=12z | | n-14=29 | | 4a-4= | | 10t=36 | | n-5=18 | | z-7z=9z-5-z | | n+6=26 | | 2(y-4)=2(y+1) | | 86-3x=33x+22 | | x^4+x^3-4x^2-2x+4=0 | | 10f+9=59 | | 3(3c-1)-2=7c+7 | | 7=12x | | 8x+5.4=6x+9.6 | | 12c^2-13cd-4d^2=0 | | 312=2n+2 | | 21x-6-14x+4=17x-9-10x-9-10x+15 | | 3x^4+x^2-2=0 | | 5.7q-2.2-5.9q=-1.2-4.3 | | 3(2+x)=6 | | -3(2x-4)+9x-5= | | -14.9+4a-2.7+2a=5.1+7a+1.5 | | 8x-(2x+8)=34 | | 0.07x=70 | | 0.07x=7 |