Решите уравнение 1150. Created by danfomin11. matematika-ru

Решите уравнение 1150...

danfomin11 @danfomin11

October 2021 1 13 Report

Решите уравнение 1150

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GlebGor1998

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1) 0,4(х - 3) -1,6 = 5(0,1х -0,5)       0,4х -1,2 -1,6 = 0,5х -2,5
    0,4х - 0,5х = 1,2 +1,6 -2,5         - 0,1х = 0,3        х = -3
2) 1,5(2х-5) +2х = 5(0,5х -1,5)-10           3х - 7,5 + 2х = 2,5х -7,5 -10
     3х +2х -2,5х = 7,5 -7,5 -10         2,5х = -10             х = -4
3) 2/3(1 1/2 *х + 3/5) - 4/5 (8/12 *х -1/2) = 1 3/5
     2/3 (3/2* х +3/5) -4/5 ( 8/12 *х -1/2) = 8/5
     х + 2/5 - 8/15х +2/5 =8/5 , умножим правую и левую часть уравнения на 15 получим   : 15х +6 - 8х + 6 =24     15х -8х =24 -6 - 6      7х =12      х = 12/7

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