9x + 3 = 15
9x = 15 - 3
9x = 12
x = 12÷9
x = 1 3/9
х = 1 1/3 ( одна целая одна третья )
ответ 1 1/3
3(3x+1)=159x+3=159x=15-39x=12x= 12:9x= 12/9 = 4/3x= 1 1/3
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9x + 3 = 15
9x = 15 - 3
9x = 12
x = 12÷9
x = 1 3/9
х = 1 1/3 ( одна целая одна третья )
ответ 1 1/3
3(3x+1)=15
9x+3=15
9x=15-3
9x=12
x= 12:9
x= 12/9 = 4/3
x= 1 1/3