Ответ:
Пошаговое объяснение:
1) 4/7(x-1)=2/7+x
4/7x-4/7=2/7+x
4/7x-x=2/7+4/7
-3/7x=6/7
x=6/7:(-3/7)
x=-2
2) 5(x-1.5)=4 2/3x-8 3/14
5x-7.5=4 2/3x-8 3/14
5x-4 2/3x=-8 3/14+7.5
1/3x=-10/14
x=-10/14:1/3
x=-30/14=-2 1/7
3) 23/40(8t+5)-t=2.6t-(3t-3/4)
23/5t+23/8-t=2.6t-3t+3/4
4.6t-t-2.6t+3t=3/4-23/8
4t=-17/8
t=-17/8:4
t=-17/32
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Answers & Comments
Ответ:
Пошаговое объяснение:
1) 4/7(x-1)=2/7+x
4/7x-4/7=2/7+x
4/7x-x=2/7+4/7
-3/7x=6/7
x=6/7:(-3/7)
x=-2
2) 5(x-1.5)=4 2/3x-8 3/14
5x-7.5=4 2/3x-8 3/14
5x-4 2/3x=-8 3/14+7.5
1/3x=-10/14
x=-10/14:1/3
x=-30/14=-2 1/7
3) 23/40(8t+5)-t=2.6t-(3t-3/4)
23/5t+23/8-t=2.6t-3t+3/4
4.6t-t-2.6t+3t=3/4-23/8
4t=-17/8
t=-17/8:4
t=-17/32