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Simplifying 3x + (x + 5) = 21 Reorder the terms: 3x + (5 + x) = 21 Remove parenthesis around (5 + x) 3x + 5 + x = 21 Reorder the terms: 5 + 3x + x = 21 Combine like terms: 3x + x = 4x 5 + 4x = 21 Solving 5 + 4x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 4x = 21 + -5 Combine like terms: 5 + -5 = 0 0 + 4x = 21 + -5 4x = 21 + -5 Combine like terms: 21 + -5 = 16 4x = 16 Divide each side by '4'. x = 4 Simplifying x = 4
| 2x+12x=3x-5 | | a+(a-4)=(a+5)-a+1 | | x^2(15x^2-15)=0 | | 3x-4i=4+4i | | 24x+(x-8)=242 | | -10X-19=19-8X | | 5y^2+28y+15=0 | | 2t^2-5t+3=0 | | -4k+2(5k-6)=-3k | | 5(x+4)=7(x+2) | | 2(3+5x)-3=63 | | 3x(2x-1)(3x+2)=0 | | 3x(2-6)+7=-12x+7 | | 6-3(2x-4)=4+3(x-1) | | c^2+14c+40=x | | 10x^2+85x=45 | | 3(4x-3)=7(x-3)-2 | | 7x^2+5x-9=3-3x | | 6x-2+3x=3(-3x+7) | | 15+3(2x-9)=50 | | y-18=15y+10 | | 7x-4=-8x-23 | | Y=81x^2-25 | | 1+Q=2 | | 89-3x=24x+17 | | 2x+10=5x-23 | | x=16x-40 | | (2x+46)=(6x+6) | | 8n=12-4 | | x+(3x+9)+(x-18)=21 | | x=56x | | x-5=16x-35 |