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olesia19
@olesia19
July 2022
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Помогите пожалуйста номер 1619.
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anushervon10
Везде умножим накрест
1)(2x+5.2)/3=4.1/1.5
(2x+5.2)*1.5=3*4.1
3x+7.8=12.3
3x=12.3-7.8=4.5
x=1.5
2)1.8*2.5=(x+1)*0.9
4.5=0.9x+0.9
0.9x=3.6
x=4
3)8*3.2=(x-3)*12.8
25.6=12.8x-38.4
12.8x=64
x=5
1 votes
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Answers & Comments
1)(2x+5.2)/3=4.1/1.5
(2x+5.2)*1.5=3*4.1
3x+7.8=12.3
3x=12.3-7.8=4.5
x=1.5
2)1.8*2.5=(x+1)*0.9
4.5=0.9x+0.9
0.9x=3.6
x=4
3)8*3.2=(x-3)*12.8
25.6=12.8x-38.4
12.8x=64
x=5