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Simplifying (12 + -3x) + -1(4 + -5x) = 20 Remove parenthesis around (12 + -3x) 12 + -3x + -1(4 + -5x) = 20 12 + -3x + (4 * -1 + -5x * -1) = 20 12 + -3x + (-4 + 5x) = 20 Reorder the terms: 12 + -4 + -3x + 5x = 20 Combine like terms: 12 + -4 = 8 8 + -3x + 5x = 20 Combine like terms: -3x + 5x = 2x 8 + 2x = 20 Solving 8 + 2x = 20 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + 2x = 20 + -8 Combine like terms: 8 + -8 = 0 0 + 2x = 20 + -8 2x = 20 + -8 Combine like terms: 20 + -8 = 12 2x = 12 Divide each side by '2'. x = 6 Simplifying x = 6
| 6x=729 | | 3x=216 | | 2x-47=242 | | 85=15h+25 | | 9n^2=81 | | y^2-13=0 | | 4x+5=5x-12 | | N^2-12n+42=0 | | -14-16=7-9x | | 12x-(4x-3)=8x+(9-4x) | | 4b^2=-28 | | 12x-(4x-3)=8x | | 3(3n-4)=15 | | P^2+3=54 | | 3x+7=62-3x | | 3y+4(7y-2)+5=9(2y-3)-3(y-72) | | 11-10x=83-31x | | 6x^2-7=47 | | -137-10x=10x+23 | | 5x*x+2x+9=-8 | | x*x*x+5x*x+2x+9=-8 | | n+(n+2)+(n+4)=24 | | 19-4x=28-5y | | 4x^2-15x+18=0 | | 7-5x=2x-14 | | 4x^2-15x+8=0 | | 2x^3-3x^2-12x-1=0 | | 52-2x=7x+18 | | x-2x-4x= | | 67-3x=10x+16 | | 9(x-1)=0.9 | | -16t^2+38.4t+3.5=0 |