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Simplifying 4x + 9 = 2x + 21 Reorder the terms: 9 + 4x = 2x + 21 Reorder the terms: 9 + 4x = 21 + 2x Solving 9 + 4x = 21 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 9 + 4x + -2x = 21 + 2x + -2x Combine like terms: 4x + -2x = 2x 9 + 2x = 21 + 2x + -2x Combine like terms: 2x + -2x = 0 9 + 2x = 21 + 0 9 + 2x = 21 Add '-9' to each side of the equation. 9 + -9 + 2x = 21 + -9 Combine like terms: 9 + -9 = 0 0 + 2x = 21 + -9 2x = 21 + -9 Combine like terms: 21 + -9 = 12 2x = 12 Divide each side by '2'. x = 6 Simplifying x = 6
| 42-(x)=15 | | x+1900=3200 | | x+400=3200 | | X(Z+Y)= | | 25-(x)=24 | | x-400=3200 | | x-1900=2800-1900 | | x-1900=2800 | | x^2-4x-77=0 | | 2n+-1+7=12 | | 2t+3(t-2)=4 | | .07x+.04(x-1900)=232 | | x+11x+48=180 | | aX-b+g=d | | aX-b+c=d | | 2x-(77-2x)=77-2x-x | | x+7x+26=90 | | 1.3(3y-2)-1=-8.7+3.9y+5.1 | | .07(4400)-1900(.04)=232 | | 2x-(77-2x)=77-2x-(x) | | 4x^6-6x^2=0 | | 12-4Y=16 | | 2x-9=90 | | 77-2x+x= | | .07x-1900(.04)=232 | | 2x-y=y-x | | x^2+6x-3240= | | 77-2x-x=2x-77-2x | | 7(9)+26=90 | | -(8y+3)-(-7y-7)=-4 | | 7x+26=90 | | 2x+y=77 |