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Simplifying 2(x + 4) = 21 Reorder the terms: 2(4 + x) = 21 (4 * 2 + x * 2) = 21 (8 + 2x) = 21 Solving 8 + 2x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + 2x = 21 + -8 Combine like terms: 8 + -8 = 0 0 + 2x = 21 + -8 2x = 21 + -8 Combine like terms: 21 + -8 = 13 2x = 13 Divide each side by '2'. x = 6.5 Simplifying x = 6.5
| -21+25=m-1 | | 2x+3x-1+x+5+5x+4= | | 3x-7x+4=0 | | 3x-6/x-2 | | 9(x-9)=3x-39 | | 4.2n+7.0w-7.3w+6.6n= | | x+4x=275 | | y=63(0)+26 | | d/-4+3=15 | | 3*x+9=45 | | 6.7m+7.8p-1.9p+2.6m= | | 2-2=3x+9 | | (7w+4)-(2w-1)= | | y^4+2y^2-99=0 | | 5z=17-27 | | x+14x=276 | | 12x-10x-4=11 | | -2a+10+5a=28 | | n-14.7=407 | | 4x^2-28+40=0 | | 8x^3/5-24=0 | | (2m)(m-3)=7 | | 4x^2+3x-16=0 | | 4x^2+7x=9 | | 8x^3/2-24=0 | | 8x-17=6x+11 | | 3.56-12= | | 9s+5-2s=33 | | (4a-5)-8(2.5a+3)= | | 5/6x=2+2/3x | | 1.24b+2.43+4.87b= | | .60x=144 |