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Simplifying (x + 9) + (3x + 12) = 0 Reorder the terms: (9 + x) + (3x + 12) = 0 Remove parenthesis around (9 + x) 9 + x + (3x + 12) = 0 Reorder the terms: 9 + x + (12 + 3x) = 0 Remove parenthesis around (12 + 3x) 9 + x + 12 + 3x = 0 Reorder the terms: 9 + 12 + x + 3x = 0 Combine like terms: 9 + 12 = 21 21 + x + 3x = 0 Combine like terms: x + 3x = 4x 21 + 4x = 0 Solving 21 + 4x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + 4x = 0 + -21 Combine like terms: 21 + -21 = 0 0 + 4x = 0 + -21 4x = 0 + -21 Combine like terms: 0 + -21 = -21 4x = -21 Divide each side by '4'. x = -5.25 Simplifying x = -5.25
| 4x^2+16=36 | | 3x+4(53-x)=53 | | 17=2-(n+5) | | 4n-9n-11=4 | | 5x-8+5x=-38 | | H=16t^2-25 | | 4y-3=-27 | | y=6+30x | | 3b-5=4b+2 | | 8x=6x+22 | | 8x-(3x-18)=63 | | 5-(a+2)=3(a+4) | | 3y+7=4 | | U(Y)=5-0.25y | | 4y+36=15+8y | | x/3-8x=7 | | 21/x=7/15 | | 22x+(3x+5)=66 | | g+23(3+g)=-4(g+1) | | u=2(8n+32)+5(n+1) | | 4b-3=13 | | -/5x=-12 | | 12m^2+34m-28=0 | | u/8=11/3 | | -x^2-13x+36=0 | | -64=8/5(x-9) | | 2y+10=6y | | y=2(x-5)2+4 | | 9x+5=-49 | | (5+x)=2 | | log(4x+3)=1+log(x-9) | | 8-6(s-2)=4(3+s) |