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Simplifying (3x + 1) + (2x) = 21 Reorder the terms: (1 + 3x) + (2x) = 21 Remove parenthesis around (1 + 3x) 1 + 3x + (2x) = 21 Combine like terms: 3x + (2x) = 5x 1 + 5x = 21 Solving 1 + 5x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 5x = 21 + -1 Combine like terms: 1 + -1 = 0 0 + 5x = 21 + -1 5x = 21 + -1 Combine like terms: 21 + -1 = 20 5x = 20 Divide each side by '5'. x = 4 Simplifying x = 4
| 90+90+90+y=360 | | 5x+2(3-x)+1=14 | | 2/9*1/2 | | 1half(8-6)=h | | 7d+4=67 | | n-3/4=4n-7/5 | | 2(3x+1)=3(4x+1) | | 6w^2+5wp-21p^2=0 | | k/8+3=15 | | 4x+3=4(3)+3 | | m/v=d | | Z/6+6=-16 | | -0.6=0.1+x | | 2xy+7x+6xy+3xy+(-3x)=0 | | 2e^8x=149 | | 5=1+4x-6x | | 5x+2(3-x)+1=15 | | 7h/3=5 | | x^2-(x/2)+30 | | 9-2h=-1 | | 35x+5=35x+5 | | 38=-4(6-4p)+6(p+3) | | 4n-2n=2 | | -3(N+8)=12 | | 6-2/3m=3/4+m | | x^2-x/2+30 | | -3x+2-7x=-18 | | -24=-4m-6-2 | | -3x^6-15x^5+72x^4=0 | | 4=2-5g | | 2(c-14)=-26 | | x+35+105+105+y+50=180 |