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Simplifying 7x + -2x + 6 = 21 Reorder the terms: 6 + 7x + -2x = 21 Combine like terms: 7x + -2x = 5x 6 + 5x = 21 Solving 6 + 5x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + 5x = 21 + -6 Combine like terms: 6 + -6 = 0 0 + 5x = 21 + -6 5x = 21 + -6 Combine like terms: 21 + -6 = 15 5x = 15 Divide each side by '5'. x = 3 Simplifying x = 3
| 3b+3b-2=10 | | 25+(3+7)=(25+3)+7 | | 7+-1y+5y=9 | | 164b^2-340b=-4b^2 | | 4.5g+0.7=18.75 | | -7=y-16 | | 2y-12/4 | | 3-3lnx=8 | | h-(-4)=12 | | -6=-11+t | | -19+5(0.2x+3)-12x= | | 4x=2x(4) | | 10m-10m+3m+m-4=4 | | log[2](x^3)=log[2](x) | | 42x4/7 | | 4s-2s+s+2=17 | | x^2+2x=4-x | | 5c+5c-6c+3c+1=8 | | 5r^2+5r+1=0 | | 11x-11x+x+1=2 | | W^2-20x-36=0 | | 2(1x+-7)=3x | | 12n-10n+1=17 | | -10(s+4)=-51 | | 7,4/x=3,7/0,5 | | 2n+2n-3n=9 | | 20a+4a-20a-2=10 | | 8m-2m=12 | | 14m-6m-4m=12 | | 2s-s+2s-s-s=16 | | (y-2)-(y-3)= | | 34=3x+4 |