решите примеры 3х=28-х 5х+12=8х+30 33+8х=-5х+72 7-2х=3х-18 2х+9=2х-4. Created by krasotka365. matematika-ru

решите примеры 3х=28-х 5х+12=8х+30 33+8х=-5х+72 7-2х=3х-18 2х+9=2х-4...

krasotka365 @krasotka365

July 2022 1 2 Report

решите примеры
3х=28-х
5х+12=8х+30
33+8х=-5х+72
7-2х=3х-18
2х+9=2х-4

Answers & Comments

Regent1828

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3x = 28 - x 5x + 12 = 8x + 30 33 + 8x = -5x + 72
3x + x = 28 5x - 8x = 30 - 12 8x + 5 x = 72 - 33
4x = 28 -3x = 18 13x = 39
x = 28 : 4 x = 18 : (-3) x = 39 : 13
x = 7 x = -6 x = 3

7 - 2x = 3x - 18 2x + 9 = 2x - 4
7 + 18 = 3x + 2x 13 = 2x - 2x
5x = 25 13 = 0
x = 25 : 5 ∅
x = 5

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Answers & Comments

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