79+(89-n)=103,б)9z+3z-13=155. Created by Malika12345yyio. matematika-ru

79+(89-n)=103,б)9z+3z-13=155...

July 2022 1 13 Report

79+(89-n)=103,б)9z+3z-13=155

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Грет85 79+(89-n)=103
89-n=103-79
89-n=24
-n=24-89
-n=-65
n=65
проверка 79+(89-65)=103
79+24=103
103=103

9z+3z-13=155
12z-13=155
12z=155+13
12z=168
z=168/12
z=14
проверка 9*14+3*14-13=155
126+42-13=155
155=155

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