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Simplifying 28 + -7 = 3x Combine like terms: 28 + -7 = 21 21 = 3x Solving 21 = 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. 21 + -3x = 3x + -3x Combine like terms: 3x + -3x = 0 21 + -3x = 0 Add '-21' to each side of the equation. 21 + -21 + -3x = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -3x = 0 + -21 -3x = 0 + -21 Combine like terms: 0 + -21 = -21 -3x = -21 Divide each side by '-3'. x = 7 Simplifying x = 7
| (x+13)+(3x)+(6x+7)=180 | | x^2-24=300 | | x*3-[(x+10)*2]=x-20 | | 159-5n=20+n | | -2x-9=6x-97 | | +2+3(2x-1)=2-2x | | 5c-34=n-10 | | 2x+5y-1=9 | | x+3=1+2(x-2) | | 1.17x=7 | | 3x-3=15-6x | | 34=3x-5 | | 12x-18x+10x=12 | | 4s+9=7s+3 | | -12=2x-8 | | 28x^2+16x^3-20x^4+12= | | 5r+4=14r+1 | | 1x+4+2=x-3 | | 6r-4=10r+8 | | 5x-11y= | | 1g+2-4=6 | | 20-4m=2m+8 | | 9(5-2m)0=-7(4m-2) | | 5x+2(2x-23)=-54 | | 10y+2=22 | | -1-x=4x+24 | | 2y+3+3=1 | | 15+22=7x+62 | | 3x^2-22=-24 | | 5r+3=14r | | =0.02*1760 | | -2y+5=4 |