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Simplifying -9 + 2x + 3x = 21 Combine like terms: 2x + 3x = 5x -9 + 5x = 21 Solving -9 + 5x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + 5x = 21 + 9 Combine like terms: -9 + 9 = 0 0 + 5x = 21 + 9 5x = 21 + 9 Combine like terms: 21 + 9 = 30 5x = 30 Divide each side by '5'. x = 6 Simplifying x = 6
| rs=t | | (1)/(2)6= | | -x^2+19x+42= | | 2y+4y=90 | | y+2x-3=0 | | (-xy^2)(2xy)(-3y)= | | 8x-4=-10x+5 | | 16x^3-9x^2=0 | | -4(x+1)-10=19+3 | | 20x^3+28x^2+60x=0 | | -5+2(x-2)= | | 6x+10+7x=75 | | 7(2x+1)-4x= | | -18+8x=-7(x-4)-8x | | 2x-6y=14 | | 8x-x(x+4)= | | -3(3x-6)-2x= | | 3x+5+6x-14=180 | | 3y^4-4y^3-4y^2=0 | | -4(x+3)+5= | | x+2(x-4)=1+3(x+2) | | 7y-1=11y+19 | | 2+6lnx=11 | | x+2(x-4)=1+3(x-2) | | -4(-5)(-5)= | | -30+8x=-5(6-8x) | | 20(9-.8y)+16y=180 | | 4=6/2(x)-3 | | vm=w | | 9x+37=6x+8 | | 6(5x+12)=161 | | -9x-1=17 |