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Simplifying 5(4k + -4) = 80 Reorder the terms: 5(-4 + 4k) = 80 (-4 * 5 + 4k * 5) = 80 (-20 + 20k) = 80 Solving -20 + 20k = 80 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + 20k = 80 + 20 Combine like terms: -20 + 20 = 0 0 + 20k = 80 + 20 20k = 80 + 20 Combine like terms: 80 + 20 = 100 20k = 100 Divide each side by '20'. k = 5 Simplifying k = 5
| 0=x^2+6x+7 | | 2x+4=-3x-14 | | 5x+10(x+7)=175 | | 1.3-2.5=1.4 | | 5x-7x-1=13.45 | | Y=2x+20x-10 | | 8x-20=.5x+25 | | 2=x(x-3) | | 63=-3(4-5k) | | 0.11y+0.02(y+4000)=1120 | | 8-7n+4n=29-69 | | 5*x-15=52 | | -12-5m=-1(1+m)+1 | | 3.5+x=4.128 | | cosx+2=1-cosx | | n^2=-25-12n | | -9x-5=6x+40 | | Y^2*DX+(3XY-4Y^2)DY=0 | | 9s=45 | | Y^2DX+(3XY-4Y^2)DY=0 | | -3(6x+6)=90 | | 5*x-16=52 | | 3y+11=38 | | 117-81=35y-44y | | z^2+(2+2i)z+6i=0 | | 9p^2+12pq+4q^2=0 | | 9y+5=165 | | 2-b=15 | | 2(3x-5)=6(2x+4) | | y=5x-2forx | | -7+3+3x=-38 | | [2(y+5)]=40 |