Ответы на вопрос:
1) x+4(1×7+2)=2×28+5
x+4(7+2)=2×28+5
x+4×9=2×28+5
x+36=2×28+5
x+36=56+5
x+36=61
x=61−36
х=25
2) 9(1×9+5)−x=46
9(9+5)−x=46
9×14−x=46
126−x=46
−x=46−126
−x=−80
х=80
3) 4x+3=1×24+7
4x+3=24+7
4x+3=31
4x=31−3
4x=28
х=28/4
x=7
x+4(7+2)=2×28+5
x+4×9=2×28+5
x+36=2×28+5
x+36=56+5
x+36=61
x=61−36
х=25
2) 9(1×9+5)−x=46
9(9+5)−x=46
9×14−x=46
126−x=46
−x=46−126
−x=−80
х=80
3) 4x+3=1×24+7
4x+3=24+7
4x+3=31
4x=31−3
4x=28
х=28/4
x=7
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