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Simplifying 2(k + 9) = 21 Reorder the terms: 2(9 + k) = 21 (9 * 2 + k * 2) = 21 (18 + 2k) = 21 Solving 18 + 2k = 21 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + -18 + 2k = 21 + -18 Combine like terms: 18 + -18 = 0 0 + 2k = 21 + -18 2k = 21 + -18 Combine like terms: 21 + -18 = 3 2k = 3 Divide each side by '2'. k = 1.5 Simplifying k = 1.5
| X-9sqrtx=-14 | | L=10m*6 | | 42-4t=36 | | 1/4x10=2 | | 6x+5-9=6x+12 | | 4x-2x+3-7=-6 | | 2.25m+5=13.5m+4 | | 4y^2=-13 | | 8+4(5x-1)= | | 105-3(y)=90 | | 1.75x+2.25y=48.25 | | 14x+y=-7 | | 7n+2[3(1-n)+(-2)(1+n)]=14 | | L=W*(1+5) | | x^5-5x^3-14x=0 | | -19=3(4x+5)-(-6x-2) | | 9=8+b | | 5(3n+4)=6(8n+7)+5 | | -16+2x+6=-20 | | 4.8=0.3(12-y) | | 10000000/10 | | 23+8x=7+5(x+5) | | 15x-3y=90 | | 7/2-2=0 | | 75-3(y)=90 | | 9=1.75x-6-1.25x | | .2d+2=17 | | -2(6-10)= | | graphy=x^2-2x+5 | | -4.9h^2+12.25h+0=7.35 | | p/s=10 | | 10x-y=130 |