помогите пожайлуста!!. Created by Artem3460. matematika-ru

помогите пожайлуста!!...

Artem3460 @Artem3460

November 2021 1 8 Report

помогите пожайлуста!!

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fanta2310

Verified answer

75 - х * 2 = 5 * 9
75 - 2х = 45
2х = 75 - 45
2х = 30
х = 30 : 2
х = 15

(350 - а : 3) * 2 = 700 : 7
(350 - а : 3) * 2 = 100
350 - а : 3 = 100 : 2
350 - а : 3 = 50
а : 3 = 350 - 50
а : 3 = 300
а = 300 * 3
а = 900

295 + (16 - а : 10) = 370 - 69
295 + (16 - а : 10) = 301
16 - а : 10 = 301 - 295
16 - а : 10 = 6
а : 10 = 16 - 6
а : 10 = 10
а = 10 * 10
а = 100

(400 : х - 15) * 2 = 900 : 90
(400 : х - 15) * 2 = 10
400 : х - 15 = 10 : 2
400 : х - 15 = 5
400 : х = 5 + 15
400 : х = 20
х = 400 : 20
х = 20

3 * (27 : с + 4) = 78 : 2
3 * (27 : с + 4) = 39
27 : с + 4 = 39 : 3
27 : с + 4 = 13
27 : с = 13 - 4
27 : с = 9
с = 27 : 9
с = 3

15 + (72 + а * 4) = 23 * 5
15 + (72 + а * 4) = 115
72 + а * 4 = 115 - 15
72 + а * 4 = 100
4а = 100 - 72
4а = 28
а = 28 : 4
а = 7

у - 34 * 2 = 1000 : 100
у - 68 = 100
у = 100 + 68
у = 168

900 : (с - 27) = 150 : 5
900 : (с - 27) = 30
с - 27 = 900 : 30
с - 27 = 30
с = 30 + 27
с = 57

210 - 24 * а = 810 : 9
210 - 24а = 90
24а = 210 - 90
24а = 120
а = 120 : 24
а = 5

2 * (800 - у * 2) = 1200 : 2
2 * (800 - 2у) = 600
800 - 2у = 600 : 2
800 - 2у = 300
2у = 800 - 300
2у = 500
у = 500 : 2
у = 250

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Verified answer

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