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Simplifying -21 + 2x + 3x = 9 Combine like terms: 2x + 3x = 5x -21 + 5x = 9 Solving -21 + 5x = 9 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 + 5x = 9 + 21 Combine like terms: -21 + 21 = 0 0 + 5x = 9 + 21 5x = 9 + 21 Combine like terms: 9 + 21 = 30 5x = 30 Divide each side by '5'. x = 6 Simplifying x = 6
| 3x/5-7 | | 3x^2-12x^2-45x=0 | | .67n+6=.25n-3 | | 2x+3/8=67/8 | | 3x(-15)=-12 | | y=5(4)-2 | | -3/4=-1/7x-2/3 | | 55x=1/9(4x+10) | | 3x(-8)=-18 | | y=5(3)-2 | | 7/33+1/3 | | .4x+.36=.12-.1x | | .09-.01(x+2)=-.02(4-x) | | y=5(1)-2 | | z/3=3 | | 3x/16 | | 6/11-1/3 | | 50x-25=2x^3-2x | | 5x-2x-10=17 | | 3x(-4)=-12 | | 50x-25=2x^2-2x | | y=5(-1)-2 | | a-5/6-3(a-3)/10=2a+2/5 | | 5x-2x-10= | | y=5(-2)-2 | | 4z+3-z=6z-7 | | y=5(-3)-2 | | -1/7=15/2x+4/7 | | x-2+5/x-3=4-x+5/x-3 | | -40=1m-10m | | 12(5/6x+1/12x)=12(7/12+x) | | 3x(-4)=12 |