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Simplifying (z + 21) + (z + 48) = 168 Reorder the terms: (21 + z) + (z + 48) = 168 Remove parenthesis around (21 + z) 21 + z + (z + 48) = 168 Reorder the terms: 21 + z + (48 + z) = 168 Remove parenthesis around (48 + z) 21 + z + 48 + z = 168 Reorder the terms: 21 + 48 + z + z = 168 Combine like terms: 21 + 48 = 69 69 + z + z = 168 Combine like terms: z + z = 2z 69 + 2z = 168 Solving 69 + 2z = 168 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-69' to each side of the equation. 69 + -69 + 2z = 168 + -69 Combine like terms: 69 + -69 = 0 0 + 2z = 168 + -69 2z = 168 + -69 Combine like terms: 168 + -69 = 99 2z = 99 Divide each side by '2'. z = 49.5 Simplifying z = 49.5
| (4x^2-3x+6)+(2x^2-5)= | | 4.7+1.6x=2.6x | | 6x-2+6x=94 | | 3ax^3+3ay^3= | | 2*(x+3)=-4*(x+1) | | (z+21)+(z+84)=168 | | 8k+7=7k | | 1/3w-2=4/3w | | =124 | | -8p=40 | | 9-3k=17-3k | | -14x-21=-12x+70 | | (z-21)+(z-48)=168 | | 55/8+21/8 | | 3/4x=1/2x | | 12+5v=5v+3 | | x^2-4x=90-3x | | 4y+2=6y-5 | | -11=8+x | | (3x^2+x+4)-(2x-3)= | | 11/5b=1/2 | | (L-21)+(l-48)=168 | | (3x^2+10)+(2x^2-5)= | | 1/a8 | | 14x+2y=6 | | 5=-13+y | | 8(1+1)= | | 5x-45=x+45 | | 2/3(1+n)=-0.5n | | -12x^2-32x-12=0 | | 2/3(1+n)=-0.5 | | 24=1.5x^3 |