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Simplifying (21 + -1z) + (48 + -1z) = 168 Remove parenthesis around (21 + -1z) 21 + -1z + (48 + -1z) = 168 Remove parenthesis around (48 + -1z) 21 + -1z + 48 + -1z = 168 Reorder the terms: 21 + 48 + -1z + -1z = 168 Combine like terms: 21 + 48 = 69 69 + -1z + -1z = 168 Combine like terms: -1z + -1z = -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
| x/2-x-3/4 | | 2/3x+4/9=-1/3x-3/9 | | r^2-15r=-8-10 | | 6(t-2)-67=142 | | 7/2-4/3 | | 3ab^2+2a+7=0 | | 2(6g+4)= | | -36=6[2-8n] | | -3x+3+4x=11-27 | | 2(8+2q)= | | 1.7x-3-1.2x=12.5 | | 5n-3(2n-7)=9 | | c-3c+2=-8 | | 16g^2+40g+25= | | (7+5t)7= | | -8x-17=-177 | | 3(2g+1)= | | (z+21)+(z+48)=168 | | (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 |