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Simplifying X + (3X + 5) = 21 Reorder the terms: X + (5 + 3X) = 21 Remove parenthesis around (5 + 3X) X + 5 + 3X = 21 Reorder the terms: 5 + X + 3X = 21 Combine like terms: X + 3X = 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
| -4x-2.7=7x-6 | | -3(g+10)=0 | | 7(-3x+2)=-8(4x-10) | | 2X-10=2(X-5) | | 8n+-11n+-15=12 | | 15g-14g-1=16 | | -4x+3.4=5x-1.1 | | 4s+11s=-15 | | 17b-8b=9 | | 2(s-6)=2 | | -4(b+17)=8 | | -4 ( b+ 17)= 8 | | 5x+2.4=-6x+7.9 | | 2x-3.2=x-3.9 | | 5x-0.1=4x | | 5(x+9)=25 | | 5(x-6)=-70 | | 2(x-4)=-26 | | 5(x-6)=-65 | | 3x-18=3(x+8) | | 3(x-1)=21 | | x+1.2=-2.8 | | x+-3.1=7.5 | | x+2.4=2.2 | | x+2.4=22 | | x+5.6=-5.7 | | x-(-4)=-6 | | -7x+10=2x | | x+5.2=-5.4 | | c=3d+5 | | 3x-5=10x-54 | | 11x-16=5x+2 |