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olesya2372
@olesya2372
July 2022
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0,4х + 3 = 0,2(3х + 1) - х
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Chevell
0.4x+3=0.2(3x+1)-x
0.4x+3=0.6x+0.2-x
3-0.2=0,6x-0.4x-x
2.8=-0.8x
x=-3,5
5 votes
Thanks 19
Романтина
0.4х+3=0.6х+0.2-х
0.4х+3-0.6х+х=0.2
0.4х-0.6х+х=0.2-3
-0.2х+х=-2.8
0.8х=-2.8
х=-2.8/0.8
х=-3.5
Ответ: -3.5
4 votes
Thanks 8
olesya2372
Объясни, пожалуйста, как -0,2х+х даёт 0,8х? Никак до меня не дойдёт.
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Answers & Comments
0.4x+3=0.6x+0.2-x
3-0.2=0,6x-0.4x-x
2.8=-0.8x
x=-3,5
0.4х+3-0.6х+х=0.2
0.4х-0.6х+х=0.2-3
-0.2х+х=-2.8
0.8х=-2.8
х=-2.8/0.8
х=-3.5
Ответ: -3.5