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nazavalin1
@nazavalin1
December 2021
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Привести подобные слагаемые и упростить выражение.
1. 4,6X-5,8+2,9+7,8X
2. 5a+6,1b-7,3a-3,6
3. 3 (a-7,2)+2,4a+7,5
4. 2,1 (2x+6)-(3,4x+5,9)
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prettypushkova
Verified answer
1. = (4,6х + 7,8х) - (5,8 - 2,9) = 12,4х - 2,9
2. = (5а - 7,3а) + 6,1b - 3,6 = 6,1b - 2,3a - 3,6
3. = 3а - 21,6 + 2,4а + 7,5 = (3а + 2,4а) - (21,6 - 7,5) = 5,4а - 14,1
4. = 4,2х + 12,6 - 3,4х - 5,9 = (4,2х - 3,4х) + (12,6 - 5,9) = 0,8х + 6,7
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Answers & Comments
Verified answer
1. = (4,6х + 7,8х) - (5,8 - 2,9) = 12,4х - 2,92. = (5а - 7,3а) + 6,1b - 3,6 = 6,1b - 2,3a - 3,6
3. = 3а - 21,6 + 2,4а + 7,5 = (3а + 2,4а) - (21,6 - 7,5) = 5,4а - 14,1
4. = 4,2х + 12,6 - 3,4х - 5,9 = (4,2х - 3,4х) + (12,6 - 5,9) = 0,8х + 6,7