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Simplifying 280 = 4n + 7(5n + 1) Reorder the terms: 280 = 4n + 7(1 + 5n) 280 = 4n + (1 * 7 + 5n * 7) 280 = 4n + (7 + 35n) Reorder the terms: 280 = 7 + 4n + 35n Combine like terms: 4n + 35n = 39n 280 = 7 + 39n Solving 280 = 7 + 39n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-39n' to each side of the equation. 280 + -39n = 7 + 39n + -39n Combine like terms: 39n + -39n = 0 280 + -39n = 7 + 0 280 + -39n = 7 Add '-280' to each side of the equation. 280 + -280 + -39n = 7 + -280 Combine like terms: 280 + -280 = 0 0 + -39n = 7 + -280 -39n = 7 + -280 Combine like terms: 7 + -280 = -273 -39n = -273 Divide each side by '-39'. n = 7 Simplifying n = 7
| 5x-(7x-12)=2 | | .2x+2y=10 | | -85=-5(4n+5) | | 5+3(x+8)=5 | | 2x+3+x+5+x+3x+x+5= | | X^2-33x+272.25=0 | | 28x^2-35x-42=0 | | 5n-7=-25 | | 8/7y-1=47 | | 2x+7+x+3x+1= | | -4+6=6x-2 | | A/32 | | ×/0.36=0.6/0.54 | | 71=7p+8 | | 7x+9+6x=126 | | 2x-72=243 | | 4-2(3x+4)=14 | | 4x-(6x-5)=-1 | | 8b+5=22 | | h+5=6 | | 11x+7xy+2y+14z=15 | | 6X+7X=13 | | -28=-4(8+a) | | 4(2n-4)=7(n+3) | | r-/11/3=-7 | | (-4b)4= | | 16x^2+40x=-11 | | 3(t-2)+5t=4(2t+4)-9 | | 16x^2+40x+11=0 | | (-4b)b= | | -4x+4(7x+20)=-16 | | 452=6+50d |