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Simplifying 7x + -4x + -18 = 21 Reorder the terms: -18 + 7x + -4x = 21 Combine like terms: 7x + -4x = 3x -18 + 3x = 21 Solving -18 + 3x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + 3x = 21 + 18 Combine like terms: -18 + 18 = 0 0 + 3x = 21 + 18 3x = 21 + 18 Combine like terms: 21 + 18 = 39 3x = 39 Divide each side by '3'. x = 13 Simplifying x = 13
| x-86=80 | | x^2+19=86 | | 9n+16=6n+29 | | (-10)+x=13 | | -4.7q-18.29=-4.7q-0.66 | | 9x+6-8x-6=1 | | 6b^2-19b+15=0 | | a+7=4a-5 | | w^2+18w=-47 | | -12x-2x-67=157 | | -13t-13=-19+17 | | 9x+6-8x-6=6 | | 80=5x-30 | | 38+7x+1+y=180 | | -11g+14-20=-11g-6 | | 3n+10=7(5n-6)-6n | | f^2-4f-23=0 | | 5x+7x-82=146 | | M/4-6=-9 | | 10.01-9.5n=10.2n | | 11x+2(w+1)=5w-6 | | 30A+6B-5C=0 | | 4-x=8-3x | | -5.11+11.6f=-17.52+11.6f+11.77 | | -6(4r+6)+r=-5r-36 | | 18/0.06 | | 6(7-2p)=3(5p-1) | | -18h+12=7-18h | | s^2-26s=11 | | 4x^2=4/9 | | -13r-20-7r=-10+20 | | 8a-3=6a+17 |