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Simplifying 3(x + 7) = 2[x + -1(2 + -1x)] Reorder the terms: 3(7 + x) = 2[x + -1(2 + -1x)] (7 * 3 + x * 3) = 2[x + -1(2 + -1x)] (21 + 3x) = 2[x + -1(2 + -1x)] 21 + 3x = 2[x + (2 * -1 + -1x * -1)] 21 + 3x = 2[x + (-2 + 1x)] Reorder the terms: 21 + 3x = 2[-2 + x + 1x] Combine like terms: x + 1x = 2x 21 + 3x = 2[-2 + 2x] 21 + 3x = [-2 * 2 + 2x * 2] 21 + 3x = [-4 + 4x] Solving 21 + 3x = -4 + 4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4x' to each side of the equation. 21 + 3x + -4x = -4 + 4x + -4x Combine like terms: 3x + -4x = -1x 21 + -1x = -4 + 4x + -4x Combine like terms: 4x + -4x = 0 21 + -1x = -4 + 0 21 + -1x = -4 Add '-21' to each side of the equation. 21 + -21 + -1x = -4 + -21 Combine like terms: 21 + -21 = 0 0 + -1x = -4 + -21 -1x = -4 + -21 Combine like terms: -4 + -21 = -25 -1x = -25 Divide each side by '-1'. x = 25 Simplifying x = 25
| 12b=-8 | | 6(-2+3x)=-120 | | 6x-7=19-7x | | 4(x-5)-5(x-4)=x+3-(x-4) | | a^2+b^2-900=0 | | p-5=-1 | | 2x-(2/x^2)=0 | | w+17=29 | | 6(-1+1x)=-30 | | 8x=5(x-1)+8 | | 16(12)+16(8)= | | 5.6y+4=1.3y-2 | | 2(-9-2x)=-46 | | 2(12+5)= | | 5x^3-5x^2+20=20x | | 1+1/3=27 | | 3(x+2)=3x+1 | | 3m+3w= | | 90=w(2w+3) | | -6x+8-4x=-2 | | -3(x+2)=3x+1 | | x=3/4=1/4 | | -25=4x+2x-9 | | 2(7x-2)=3(2+3x) | | 3c+5d= | | -0.6w+5=4 | | (2+y)(5y+3)=0 | | x^4+2x^3-x^2-6x-3=0 | | -5=3x-2x-5 | | -0.5x-7=18 | | V=600-500 | | x^(1/2)=25 |