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Simplifying 9 = 2x + -4x Combine like terms: 2x + -4x = -2x 9 = -2x Solving 9 = -2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2x' to each side of the equation. 9 + 2x = -2x + 2x Combine like terms: -2x + 2x = 0 9 + 2x = 0 Add '-9' to each side of the equation. 9 + -9 + 2x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 2x = 0 + -9 2x = 0 + -9 Combine like terms: 0 + -9 = -9 2x = -9 Divide each side by '2'. x = -4.5 Simplifying x = -4.5
| (c+d)(c-d)= | | x=x^3+3x | | 3x+(2x-10)=180 | | 12x+5=3x-7 | | 14x=2(7x+15) | | 3x^2+3=8 | | 2x+3x=2 | | (x-20)+80=180 | | X^2+kx=0 | | 8x-80=-2x+116 | | x+y=78 | | Y-10.4=5.3 | | 2x+4y=272 | | N*-8=56 | | x=2.461 | | 3x*lne=8 | | 2x+3x=2+3x | | 23x^2+6x+19=0 | | 6x-21=33+15x | | -6(n+5)=-2n-6 | | x=1.9 | | 9x^2+8x+16=0 | | -20+75b=50 | | x=4.58 | | log(x)=0.004 | | 1+c+1.4=c+24 | | 2x-34(32-7)=5x+90 | | 35+4a=-5+8(5a-4) | | 6x-3=4c+9 | | 17+4k=5(-5+5k) | | 13b+20=50 | | 17+4k=5(-5-5k) |