

a,[tex](\frac{4}{5}: \frac{6}{5}+\frac{1}{5}:\frac{1}{x}) * 30 -26 =54[/tex]
b, (x+9) +(x-2)+(x+7)+(x-4)+(x+5)+(x-6)+(x+3)+(x-8)+(x+1)=95
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b, (x+9) +(x-2)+(x+7)+(x-4)+(x+5)+(x-6)+(x+3)+(x-8)+(x+1)=95
@shorlochomevn@gmail.com @swat.aiichi.machiko@gmail.com @dangtiendung1201