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Simplifying n + (n + 4) + (n + 7) = 74 Reorder the terms: n + (4 + n) + (n + 7) = 74 Remove parenthesis around (4 + n) n + 4 + n + (n + 7) = 74 Reorder the terms: n + 4 + n + (7 + n) = 74 Remove parenthesis around (7 + n) n + 4 + n + 7 + n = 74 Reorder the terms: 4 + 7 + n + n + n = 74 Combine like terms: 4 + 7 = 11 11 + n + n + n = 74 Combine like terms: n + n = 2n 11 + 2n + n = 74 Combine like terms: 2n + n = 3n 11 + 3n = 74 Solving 11 + 3n = 74 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + 3n = 74 + -11 Combine like terms: 11 + -11 = 0 0 + 3n = 74 + -11 3n = 74 + -11 Combine like terms: 74 + -11 = 63 3n = 63 Divide each side by '3'. n = 21 Simplifying n = 21
| -18+3y=18 | | -6x-4x-40=90 | | -3x-11+x=9 | | -x-19+6x=21 | | -70+4x+6x=60 | | 2x+9=6+5x | | 3-t=5-3t | | -5-x+2x=9 | | 9x+5y=37 | | 17m+7m+8n-23m-7n=12 | | 8-2x+6x=-2(-5x+2) | | 4(6x-10)=10 | | 5X+9X=300 | | 180=x^2+100-2x | | 7x^2+35=91 | | 60+14m=270 | | 13=5x+4x+4 | | x^2+-15x+-30=0 | | 840-2W-60=A | | Log^2(5x-4)=3 | | 55+6y-4=17y-12-2y | | 29n-120=228 | | 21+3y-4=15y-11-5y | | 6a+5+a=5(a+3) | | 28+3y-10=13y-10-3y | | 7x+3x^2=-3 | | a+2b=-1 | | 11=5n | | 12-3x=-8+7x | | 9x^2-y-72x+8y+119=0 | | 16x+14=30 | | x^2+16x+64=100+x^2 |