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Simplifying 21x + -7 = 4(5x + 2) + -1 Reorder the terms: -7 + 21x = 4(5x + 2) + -1 Reorder the terms: -7 + 21x = 4(2 + 5x) + -1 -7 + 21x = (2 * 4 + 5x * 4) + -1 -7 + 21x = (8 + 20x) + -1 Reorder the terms: -7 + 21x = 8 + -1 + 20x Combine like terms: 8 + -1 = 7 -7 + 21x = 7 + 20x Solving -7 + 21x = 7 + 20x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20x' to each side of the equation. -7 + 21x + -20x = 7 + 20x + -20x Combine like terms: 21x + -20x = 1x -7 + 1x = 7 + 20x + -20x Combine like terms: 20x + -20x = 0 -7 + 1x = 7 + 0 -7 + 1x = 7 Add '7' to each side of the equation. -7 + 7 + 1x = 7 + 7 Combine like terms: -7 + 7 = 0 0 + 1x = 7 + 7 1x = 7 + 7 Combine like terms: 7 + 7 = 14 1x = 14 Divide each side by '1'. x = 14 Simplifying x = 14
| 2(u-2)-5u=26 | | (7r)(5r+2r)= | | -4(x-4)=-2(x-1) | | -5x-x(-6-3x)= | | y=(x+3i)(x-3i) | | 0.12y+0.08(y+8000)=1240 | | (2x+4)=(5x-8) | | 200=-2x^2+40x+100 | | 17=5(w+5)-3w | | 4c-82+c+7=180 | | -6(v+4)+4v+7=6v+7 | | 455/×=20/100 | | 28=3(v-4)+2v | | -16(x+6)=2(x-14) | | -16(x+6)=2(x+-14) | | 3z+1=-z-2 | | 2q+5q-2=180 | | 6[3-(-5x-4)]=240x+210 | | 2q+5-2=180 | | 2-2/3x=-1/2 | | 9x+6y=93.9 | | 3-x^2=33-3x^2 | | 9w+99+w+71=180 | | 2-4/6x=-1/2 | | kx^2-3x+25=0 | | -u+216=174 | | 1/3m=-8 | | (8t-3)=3(t+1)+3 | | -2p-0.5p=6.875 | | 178=9-x | | (8t-3)=3(t-1) | | 134=197-w |