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Simplifying x + (x + 9) = 39 Reorder the terms: x + (9 + x) = 39 Remove parenthesis around (9 + x) x + 9 + x = 39 Reorder the terms: 9 + x + x = 39 Combine like terms: x + x = 2x 9 + 2x = 39 Solving 9 + 2x = 39 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + 2x = 39 + -9 Combine like terms: 9 + -9 = 0 0 + 2x = 39 + -9 2x = 39 + -9 Combine like terms: 39 + -9 = 30 2x = 30 Divide each side by '2'. x = 15 Simplifying x = 15
| d-4=77 | | 5t(t-1)=20 | | 3y/8+y/4=10 | | 4x-7=6x+7 | | 14x+x=14-12 | | 14a+14b= | | x^2-14x+77=0 | | 9-6(4)=45 | | 4+2(x+8)=104 | | z^4+25=0 | | 8-4y=6y+18 | | x/3+x/2=1 | | 10n-5=2n-1 | | 30x+2=40 | | 3x/4+x/2=-5 | | 1=8k+28 | | 40x=(30x+2) | | 6(c-2)=24 | | 36=(m)2 | | 170=x+(2x+1)+(3x+2) | | 10/16= | | 5z^2+3z+5=0 | | 81-3x=2x+16 | | 6+5c=8-3c | | 5(x-6)+4=7x-10 | | 9g-4h-8g=-15 | | 170=x+2(x+1)+3(x+2) | | 5n^2=5n^2 | | 5(4n+3)-4(5n+3)=3 | | 4s-3=9+3s | | 4x+30=4.50 | | 245=125+15 |